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Experimental Physics VI

Dyakonov Group

Colour Centers, Quantum Sensors and Microwave Emitters

The development of a solid-state system for quantum information technologies and sensing applications is a very vibrant research area. An essential part of it, the spin degree of freedom, is an invaluable source of information as it provides an interface to the environment it is surrounded by. Our group is interested in 2D and 3D wide bandgap semiconductors, such as hexagonal boron nitride (hBN) and silicon carbide (SiC), which have recently attracted much interest as technologically perspective quantum platforms.

Spin Effects in Organic Semiconductors and Devices

Organic semiconductors are a promising class of materials for the next generation of light emitting diodes (OLED) and solar cells (OPV). Several phenomena in these semiconductors are related to the spin properties of triplet excitons and charge transfer states that are optically or electrically generated in device active layers and can influence the charge carrier generation and radiative recombination quantum efficiency. In other words, spin is a crucial parameter controlling the physical limits of device quantum efficiency.

Congratulations

Congratulations to Melina Armer, who successfully defended her PhD thesis "High Quality Lead-Free Double Perovskite Single Crystals and their Optical Properties". It is becoming a good tradition to meet our alumni (Nathania, Moritz, Mathias) and celebrate together.

New paper from the Spin Resonance Group

New joint paper on radical organic emitters with Sebastian Gorgon and his colleagues from the University of Cambridge, UK and other colleagues from China, UK, Belgium, Spain and our group in Würzburg:

Reversible spin-optical interface in luminescent organic radicals
S. Gorgon, K. Lv, J. Grüne, B. H. Drummond, W. K. Myers, G. Londi, G. Ricci, D. Valverde, C. Tonnelé, P. Murto, A. S. Romanov, D. Casanova, V. Dyakonov, A. Sperlich, D. Beljonne, Y. Olivier, F. Li, R. H. Friend & E. W. Evans
Nature 620, 538–544 (2023). [DOI: https://doi.org/10.1038/s41586-023-06222-1]

See also a press release here

New joint paper from the OPV group

New joint paper on Triplet-Triplet Annihilation in NFA-based organic solar cells  with Alex Gillett group (University of Cambridge, UK) and other colleagues from Munich, China and Sweden:

Understanding the Role of Triplet-Triplet Annihilation in Non-Fullerene Acceptor Organic Solar Cells
L. J. F. Hart, J. Grüne, W. Liu, Tsz-ki Lau, J. Luke, Yi-Chun Chin, X. Jiang, H. Zhang, D. J.C. Sowood, D. M. L. Unson, Ji-Seon Kim, X. Lu, Y. Zou, F. Gao, A. Sperlich, V. Dyakonov, J. Yuan and A. J. Gillett
Adv. Energy Mater. (2023). [DOI: 10.1002/aenm.202301357]

Congratulations

Congratulations to Mathias Fischer, who successfully defended his PhD thesis "Transient Phenomena and Ionic Kinetics in Hybrid Metal Halide Perovskite Solar Cells". It was an excellent opportunity to meet our alumni (thanks for coming!) and celebrate at Killiani.

New paper from the Perovskite group

New joint paper on Na, Fe lead-free perovskites with Bein & Nickel Groups (LMU) within DFG SPP2196:

Low Temperature Optical Properties of Novel Lead-Free Cs2NaFeCl6 Perovskite Single Crystals
M. Armer, P. Dörflinger, A. Weis, C. Büchner, A. Gottscholl, J. Höcker, K. Frank, L. Nusser, M. T. Sirtl, B. Nickel, Th. Bein, and V. Dyakonov
Adv. Photonics. Res. (2023). [DOI: 10.1002/adpr.202300017]

Best Poster Award for Patrick Dörflinger

Congratulations to Patrick Dörflinger, who was awarded the Park System Outstanding Poster Award for his poster "Steady-state microwave conductivity (SSMC) on ionic liquid doped lead halide perovskites" at the DPG Spring Meeting in Dresden!

Two Awards for Dr. Andreas Gottscholl

Congratulations to Dr. Andreas Gottscholl, who was awarded the Wilhelm Conrad Röntgen - Science Prize and the Wilhelm and Else Heraeus Dissertation Prize for his outstanding doctoral thesis! The award was handed over to the Gottscholl family during the Academic Ceremony of the Faculty of Physics and Astronomy on 12.12.2022 in the Neubaukirche. Andreas was in the USA at that time and thanked with the message.

New paper from the Perovskite group

New joint paper on Sn-alloyed lead-free perovskites with Bein (LMU), Hofmann (TU Darmstadt) and De Angelis (Perugia) groups within DFG SPP2196:

Heterovalent tin alloying in layered MA3Sb2I9 thin films: assessing the origin of enhanced absorption and self-stabilizing charge states
A. Weis, P. Ganswindt, W. Kaiser, H. Illner, C. Maheu, N. Glück, P. Dörflinger, M. Armer, V. Dyakonov, J. P. Hofmann, E. Mosconi, F. De Angelis, and Th. Bein
J. Phys. Chem. C (2022). [DOI: 10.1021/acs.jpcc.2c06106]

Congratulations

Congratulations to Jeannine Grüne, who successfully defended her PhD thesis "Spin States and Efficiency-Limiting Pathways in Optoelectronic Materials and Devices" on 16.11.2022

ERC Advanced Grant for Prof. Dyakonov

ERC Advanced Grant proposal entitled "Quantum sensing with van der Waals heterostructures based on hexagonal boron nitride" (BoNi-SENS) is selected for funding. It is based on the first observation of spin defects (color centres) in boron nitride by Dyakonov and Aharonovich teams in 2020 and a series of papers thereafter.

Press releases of the University of Würzburg (English, German).

Two DFG projects approved

DFG approved two research proposals within the SPP2196 Programme "Perovskite Semiconductors: From fundamental properties to devices". The purpose of these projects is to realize a stable perovskite solar cells, as well as to study coherent exciton dynamics in lead-free double perovskites of various dimensionality, respectively. Project partners are Profs. Z. Fei, M. K. Nazeeruddin (both EPFL) and I. Akimov (TU Dortmund). The complete list of projects approved in SPP2196–Phase II can be found on the coordinator's homepage (here).

Approved research project

Free State of Bavaria approved the bilateral project "IQ-Sense - Integrated Spin Systems for Quantum Sensors" under the initiative "Lighthouse projects in the field of quantum sciences and quantum technologies". IQ-Sense will develop and transfer integrated quantum sensing technologies into biomedical applications to boost detection sensitivity and to develop entirely novel sensing possibilities in this challenging environment. Project partners are Julian-Maximilian University of Würzburg (JMU) and the Technical University of Munich (TUM). From JMU, groups from the Institute of Physics, the Biocentre and the Rudolf-Virchow-Zentrum (RVZ) für Integrative und Translationale Bildgebung are involved. JMU press release (German). Press release of the Bavarian Ministry of Science (German).

New paper from the Perovskite group

New joint paper with colleagues from TU Dortmund  on spin physics of lead halide perovskites within DFG SPP2196:

The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap
E. Kirstein, D. R. Yakovlev, M. M. Glazov, E. A. Zhukov, D. Kudlacik, I. V. Kalitukha, V. F. Sapega, G. S. Dimitriev, M. A. Semina, M. O. Nestoklon, E. L. Ivchenko, N. E. Kopteva, D. N. Dirin, O. Nazarenko, M. V. Kovalenko, A. Baumann, J. Höcker, V. Dyakonov and M. Bayer
Nature Commun. (2022). [DOI: 10.1038/s41467-022-30701-0]

New paper from the Colour Centers group

Congratulations to Hex & Co. on the new joint publication within the DFG project (DY18/13-1) on stimulated emission from SiC colour centres, based on the results of four master projects

Superradiance of spin defects in Silicon Carbide for MASER applications
A. Gottscholl, M. Wagenhöfer, M. Klimmer, S. Scherbel, C. Kasper, V. Baianov, G. V. Astakhov, V. Dyakonov, and A. Sperlich
Frontiers in Photonics (2022).[DOI: 10.3389/fphot.2022.886354]

Congratulations

Congratulations to Andreas Gottscholl, who successfully defended his PhD thesis "Optical Accessible Spin Defects in Hexagonal Boron Nitride: Identification, Control and Application of the Negatively Charged Boron Vacancy VB– " on 04.05.2022

New paper from the Perovskite group

Congratulations to Melina, Patrick and Valentin on the new joint publication with colleagues from EPFL (and several others) within DFG SPP2196 - SNF project on stability of perovskite solar cells and modules

Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules
Y. Ding, B. Ding, H. Kanda, O. J. Usiobo, T. Gallet, Zh. Yang, Y. Liu, H. Huang, J. Sheng, Ch. Liu, Y. Yang, V. I. E. Queloz, X. Zhang, J.-N. Audinot, A. Redinger, W. Dang, E. Mosconic, W. Luo, F. De Angelis, M. Wang, P. Dörflinger, M. Armer, V. Schmid, R. Wang, K. G. Brooks, J. Wu, V. Dyakonov, G. Yang, S. Dai, P. J. Dyson & M. K. Nazeeruddin
Nature Nanotechnol.(2022). [DOI: 10.1038/s41565-022-01108-1]

New paper from the Perovskite group

New joint publication with colleagues from TU Dortmund within DFG SPP2196 on spin physics of perovskites

Spin Dynamics of Electrons and Holes Interacting with Nuclei in MAPbI3 Perovskite Single Crystals
E. Kirstein, D.R. Yakovlev, E.A. Zhukov, J. Höcker, V. Dyakonov, and M. Bayer
ACS Photonics 9, 1375−1384 (2022). [DOI: 10.1021/acsphotonics.2c00096]

Interview with Hannes Kraus

Interview with Dr Hannes Kraus, our former diploma and doctoral student and post-doc. Uni Würzburg press release (German)

New paper from the Colour Centers group

Two new publications on physics of spin defects in hBN with colleagues from Universities of Paderborn, Kazan and Sydney.

Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized VB– Spin States in hBN
F.F. Murzakhanov, G.V. Mamin, S.B. Orlinskii, U. Gerstmann, W.G. Schmidt, T. Biktagirov, I. Aharonovich, A. Gottscholl, A. Sperlich, V. Dyakonov, and V.A. Soltamov
Nano Letters (2022). [DOI: 10.1021/acs.nanolett.1c04610]

Spin Defects in Hexagonal Boron Nitride for Strain Sensing on Nanopillar Arrays
T. Yang, N. Mendelson, C. Li, A. Gottscholl, J. Scott, M. Kianinia, V. Dyakonov, M. Toth, and I. Aharonovich
Nanoscale (2022). [DOI: 10.1039/D1NR07919K]

New paper from the Sperlich (SpinOS) Group

New joint paper with colleagues from Oxford, Santa Barbara and Cambridge on triplet recombination channels in organic solar cells

Geminate and Nongeminate Pathways for Triplet Exciton Formation in Organic Solar Cells
A. Privitera, J. Grüne, A. Karki, W. K. Myers, V. Dyakonov, T.-Q. Nguyen, M. K. Riede, R. H. Friend, A. Sperlich, and A. J. Gillett
Adv. Energy Mater. 2103994 (2022). [DOI: 10.1002/aenm.202103944]

New paper from the Perovskite Group

New joint paper with colleagues from 15 different groups worldwide on THz and microwave (TRMC) conductivity on perovskite films with strong predictive force for solar cells

Predicting Solar Cell Performance from Terahertz and Microwave Spectroscopy
H. Hempel, T. J. Savenjie, M. Stolterfoht, J. Neu, M. Failla, V. C. Paingad, P. Kužel, E. J. Heilweil, J. A. Spies, M. Schleuning, J. Zhao, D. Friedrich, K. Schwarzburg, L. D.A. Siebbeles, P. Dörflinger, V. Dyakonov, R. Katoh, M. J. Hong, J. G. Labram, M. Monti, E. Butler-Caddle, J. Lloyd-Hughes, M. M. Taheri, J. B. Baxter, T. J. Magnanelli, S. Luo, J. M. Cardon, S. Ardo, Th. Unold
Adv. Energy Mater. 2102776 (2022). [DOI: 10.1002/aenm.202102776]

Congratulations

Congratulations to Julian Höcker, who successfully defended his PhD thesis "High-quality organolead trihalide perovskite crystals: Growth, characterisation and photovoltaic applications" on 22.02.2022

New paper from the Perovskite group

New joint paper with colleagues from TU Dortmund on photophysics of perovskite singe crystals: 

Photon echo polarimetry of excitons and biexcitons in a CH3NH3PbI3 perovskite single crystal
A. V. Trifonov, S. Grisard, A. N. Kosarev, I. A. Akimov, D. R. Yakovlev, J. Höcker, V. Dyakonov, and M. Bayer
ACS Photonics (2022) [DOI: 10.1021/acsphotonics.1c01603]

Congratulations

Congratulations to Sebastian Weißenseel, who successfully defended his PhD thesis "Spin-Spin Interactions and their Impact on Organic Light-Emitting Devices" on 19.01.2022

New paper from the Perovskite group

New joint paper with Bein (LMU), Tress (ZHAW), Mayer (TUD) and Janssen (TUe) groups: 

2D/3D Hybrid Cs2AgBiBr6 Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact-Selectivity and Large Open Circuit Voltage
M. Sirtl, R. Hooijer, M. Armer, F. G. Ebadi, M. Mohammadi, C. Maheu, A. Weis, B. T. van Gorkom, S. Häringer, R. A. J. Janssen, Th. Mayer, V. Dyakonov, W. Tress and Th. Bein
Adv. Ener. Mater. 12, 2103215 (2022) [DOI: 10.1002/aenm.202103215]

New paper from the Sperlich group

Long-lived spin-polarized intermolecular exciplex states in thermally activated delayed fluorescence-based organic light-emitting diodes
S. Weissenseel, A. Gottscholl, R. Bönnighausen, V. Dyakonov, A. Sperlich
Sci. Adv. 7 (47), eabj9961 (2021) [DOI: 10.1126/sciadv.abj9961]

Congratulations

Congratulations to Julian Höcker, Group "Photovoltaic Materials and Devices", the winner of the Best ePoster prize from Solar RRL for his Paper „The polymer polyTPD as hole transport layer for efficient solution processed CH3NH3PbI3  perovskite solar cells"  presented at the conference "Organic Materials in Perovskite-based Optoelectronic Devices 2021“ (OrgMatPerPV) on 29.-30.04.2021.

Congratulations

Congratulations to  Christian Kasper, who successfully defended his PhD thesis: "Engineering of Highly Coherent Silicon Vacancy Defects in Silicon Carbide“

New joint paper

New joint paper with Aharonovich group at  UTS and Bradac group at Trent University
 

Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride
A. Gottscholl, M. Diez, V. Soltamov, C. Kasper, A. Sperlich, M. Kianinia,  C. Bradac, I. Aharonovich, V. Dyakonov
Science Advances (2021) [DOI:10.1126/sciadv.abf3630]

See also: Uni Würzburg press release (German) (English)

 

 

Congratulations 

Congratulations to Nikolai Bunzmann, who successfully defended his PhD thesis:
"Excited State Pathways in 3rd Generation Organic Light-Emitting Diodes“

New joint paper

New joint paper with Aharonovich group at UTS and colleagues at the Universities of Berkeley, Nottingham, Canberra, Trent, Shanghai

Identifying carbon as the source of visible single-photon emission from hexagonal boron nitride

Noah Mendelson, Dipankar Chugh, Jeffrey R. Reimers, Tin S. Cheng, Andreas Gottscholl, Hu Long, Christopher J. Mellor, Alex Zettl, Vladimir Dyakonov, Peter H. Beton, Sergei V. Novikov, Chennupati Jagadish, Hark Hoe Tan, Michael J. Ford, Milos Toth, Carlo Bradac, Igor Aharonovich

Nature Materials (2020) [DOI: 10.1038/s41563-020-00850-y]

 

Congratulation to Dr. Andreas Sperlich

Congratulation to Dr. Andreas Sperlich (Hex), who was awarded with the Habilitation degree in Experimental Physics for his work “On the Role of Spin States in Molecular Donor:Acceptor Organic Solar Cells and Organic Light Emitting Diodes” after giving the public lecture entitled „2D Materialien jenseits von Graphen“. Habilitation is the highest post-doctoral qualification degree issued by German universities and is the key for access to a professorship.

New Paper on a very first spin center in 2D hBN

New joint paper with Aharonovich group at  UTS 

Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
A. Gottscholl, M. Kianinia, V. Soltamov, C. Bradac, C. Kasper, K. Krambrock, A. Sperlich, M. Toth, I. Aharonovich, V. Dyakonov
Nature Materials, 2020 [DOI: 10.1038/s41563-020-0619-6]

See also Uni Würzburg press release (in German)

 

Congratulations 

Congratulations to Katrin Anneser, who successfully defended her phd thesis:

„ Elektrochemische Doppelschichtkondensatoren zur Stabilisierung fluktuierender photovoltaischer Leistung“

 

Congratulations

to Liudmila Kudriashova, who successfully defend her PhD thesis

„ Photoluminescence Reveals Charge Carrier Recombination in Organic and Hybrid Semiconductors“

New Paper

New joint paper with EPFL and university of Augsburg

Getting the Right Twist: Influence of Donor–Acceptor Dihedral Angle on Exciton Kinetics and Singlet–Triplet Gap in Deep Blue Thermally Activated Delayed Fluorescence Emitter
S. Weissenseel, N. A. Drigo, L. G. Kudriashova, M. Schmid, T. Morgenstern, K.H. Lin, A. Prlj, C. Corminboeuf, A. Sperlich, W. Brütting, M. K. Nazeeruddin, V. Dyakonov
J. Phys. Chem. C, 2019 [DOI: 10.1021/acs.jpcc.9b08269]

Approved two research proposals

DFG approved two research proposals within the DFG SPP 2196 Programme „Perovskite Semiconductors: From fundamental properties to devices“. The purpose of these projects is to realize lead-free and stable perovskite solar cells, respectively. Project partners are Profs. T. Bein (LMU), K. Reuter (TUM), M. K. Nazeeruddin (EPFL) and Cristina Roldán Carmona (EPFL).  

Congratulations

to Michael Auth, who successfully defend his PhD thesis

„Quantitative Electron Paramagnetic Resonance Studies of Charge Transfer in Organic Semiconductors“

New Paper

Excitation and coherent control of spin qudit modes in silicon carbide at room temperature
V. A. Soltamov, C. Kasper, A. V. Poshakinskiy, A. N. Anisimov, E. N. Mokhov, A. Sperlich, S. A. Tarasenko, P. G. Baranov, G. V. Astakhov, V. Dyakonov
Nature Communications 10, 1678 (2019) [DOI: 10.1038/s41467-019-09429-x]

New Paper

Minimizing geminate recombination losses in small-molecule-based organic solar cells
R. Sandoval-Torrientes, A. Gavrik, A. Isakova, A. Abudulimu, J. Calbo,d  Juan Aragó, J. Santos, E. Ortí, N. Martín,V. Dyakonov L. Lüer
J. Mater. Chem. C, 2019, [DOI: 10.1039/C9TC00862D]

New Paper

Favorable Mixing Thermodynamics in Ternary Polymer Blends for Realizing High Efficiency Plastic Solar Cells
N. Gasparini, S. Kahmann, M. Salvador, J. D. Perea, A. Sperlich, A. Baumann, N. Li, S. Rechberger, E. Spiecker, V. Dyakonov, G. Portale, M. A. Loi, C. J. Brabec, and Tayebeh Ameri
Adv. Energy Mater. 2019, 1803394 [DOI: 10.1002/aenm.201803394]

New Paper

Near‐infrared quadrupolar chromophores combining three‐coordinate boron‐based superdonor and ‐acceptor units  
T. Stennett, P. Bissinger, S. Griesbeck, S. Ullrich, I. Krummenacher, M. Auth, A. Sperlich, M. Stolte, K. Radacki, C.-J. Yao, F. Würthner, A. Steffen, T. Marder, H. Braunschweig
Angew. Chem. Int. Ed., 2019, [DOI: 10.1002/anie.201900889]     

New Paper

Effects of Masking on Open-Circuit Voltage and Fill Factor in Solar Cells
D. Kiermasch, L. Gil, H. J. Bolink, K. Tvingstedt
Joule,  2019, 3 (1), 16-26, [DOI: 10.1016/j.joule.2018.10.016]        

New Paper

Doping Profile in Planar Hybrid Perovskite Solar Cells Identifying Mobile Ions
M. Fischer, K. Tvingstedt, A. Baumann, and V. Dyakonov
ACS Applied Energy Materials Article (2018) [DOI: 10.1021/acs.jpcc.8b08716]

New Paper

Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence
N. A. Drigo, L. G. Kudriashova, S. Weissenseel, A. Sperlich, A. J. Huckaba, M. K. Nazeeruddin, and V. Dyakonov,
J. Phys. Chem. C (2018) [DOI: 10.1021/acs.jpcc.8b08716]

Congratulations

David Keirmasch (2nd from left) at the Poster Award Ceremony on 15.03.2018 in Berlin.

to David Kiermasch and the Photovoltaic Group, winners of the Outstanding Poster Award of the Chemical and Polymer Physics (CPP) Division of the German Physical Society (DPG).
The prize sponsored by Park Systems Europe GmbH was awarded in the Annual General Meeting of the CPP Division on 15.03.2018 in Berlin.

The work entitled “Charge carrier recombination in planar n-i-p and p-i-n perovskite solar cells - the role of interfaces” is a collaboration of the Julius Maximilian University Würzburg, Instituto de Ciencia Molecular of University of Valencia in Spain and Bavarian Center for Applied Energy Research (ZAE Bayern). The work presented at the DPG Spring Meeting Berlin 2018 addressed charge carrier recombination dynamics in vacuum deposited planar n-i-p and p-i-n perovskite solar cells with power conversion efficiencies of 20 % and 17 %, respectively. David and coauthors explained the differences between both types of devices by studying charge carrier recombination dynamics with steady state and transient electrical measurements and attributed them to different recombination rates. The work at ZAE Bayern and University of Würzburg were carried out within the project titled “Potential of Perovskite Photovoltaics: Investigation of relevant physical parameters, material properties and efficiency limiting factors in hybrid perovskite solar cells” (HYPER) funded by the Federal Ministry of Education and Research (BMBF) under 03SF0514A and 03SF0514B.

New Paper

Revisiting lifetimes from transient electrical characterization of thin film solar cells; a capacitive concern evaluated for silicon, organic and perovskite devices
D. Kiermasch, A. Baumann, M. Fischer, V. Dyakonov, K. Tvingstedt
Energy Environ. Sci., 2018,11, 629-640 (2018) [DOI: 10.1039/C7EE03155F]

New Paper

Understanding the Role of Cesium and Rubidium Additives in Perovskite Solar Cells: Trap States, Charge Transport and Recombination
Y. Hu, E. M. Hutter, P. Rieder, I. Grill, J. Hanisch, M. F. Aygüler, A. G. Hufnagel, M. Handloser, E. Ahlswede, Th. Bein, A. Hartschuh, K. Tvingstedt, V. Dyakonov, A. Baumann, T. J. Savenije, M. L. Petrus, P. Docampo
Adv. Energy Mater. 2018, 8, 1703057 (2018) [DOI: 10.1002/aenm.201703057]

University of Würzburg newspaper einBLICK interviewed Dr. Hannes Kraus about his recent Nano Letter paper, the  Takasaki-Würzburg project on 3D-writing of spin defects in silicon carbide as well as on his future plans. More.

05/30/2017

Congratulation to Dr. Georgy Astakhov, who was awarded with the Habilitation degree in Experimental Physics for his work “Intrinsic Defects in Silicon Carbide for Quantum Application” after giving the public lecture entitled „Perowskite: eine Struktur mit drei einzigartigen Eigenschaften“. Habilitation is the highest post-doctoral qualification level issued by German universities and is the key for access to a professorship.

03/29/2017

Congratulation to our Silicon Carbide group! Two manuscripts were accepted for publication in high impact journals nearly at the same time, the one on „3D Proton Beam Writing of Optically Active Coherent Vacancy Spins in Silicon Carbide" by Hannes Kraus et al. in Nano Letters and the other one on „Locking of Electron Spin Coherence Above 20 ms in Natural Silicon Carbide“ by Dimitri Simin et al. in Phys. Rev. B. The latter paper has been selected by the editors of PRB to be an Editors’ Suggestion. Have a look at our list of publications.

02/15/2017

Congratulations to Hannes Kraus, who has been awarded a NASA Postdoctoral Program Fellowship at the NASA Jet Propulsion Laboratory. The NASA Postdoctoral Program is extremely selective, and this Fellowship is a recognition of his highly ranked academic and scientific achievement.

02/06/2017

Germany’s international broadcaster Deutsche Welle posted a video on Organic Solar Cells taken in our EP6 labs. Watch the video.

01/19/2017

Congratulations to our perovskite group, who published its recent findings related to various recombination mechanisms in the ACS and NPG journals. In particular, in the ACS Energy Letters they demonstrated how to reduce the shunt and surface recombination by employing polyarylamine as electron transport layer. This work was done in collaboration with our partners from the University of Valencia, Spain. In Scientific Reports they demonstrated how to improve charge carrier lifetime in planar perovskite solar cells by bromine doping. Have a look at our list of publications.

  

10/27/2016

DFG and the Austrian FWF approved the bilateral proposal "Quantum Control of Spin Centers in Silicon Carbide with Microcavities" under D-A-CH Lead-Agency. The purpose of this project is to realize light matter interfaces based on optically active defects in SiC. Project partners are Dr. Georgy Astakhov, EPVI, Uni Würzburg and Dr. Michael Trupke from Vienna Center for Quantum Science and Technology, TU Vienna.

07/11/2016

DFG and the Russian Science Foundation (RSF) approved the bilateral proposal "Polytype and isotope engineering of silicon carbide for quantum microwave amplifiers". The purpose of this project is to demonstrate quantum microwave amplification in SiC. Project partners are University of Würzburg and Ioffe Institute, Saint Petersburg, Russia. 14 Russian-German research proposals (of more than 120) will be funded under the framework of this first joint call.

07/06/2016

Good news from Brussels! Horizon 2020 Project SEPOMO - Spins for Efficient Photovoltaic Devices based on Organic Molecules was selected for funding. The project objective is to clarify the role of electron spins of photo-generated species in the efficiency of organic solar cells. The EU Commission has granted ca. 4 Mio. Euro to pursue this research and training network in 6 European countries in the coming 4 years.

07/14/2015

Congratulations! The proposal DIABASE “Highly sensitive diamond and carborundum nano-sensors and bio-markers with NIR optical addressability”, submitted under the ERA.Net RUS Plus initiative has been selected for funding. Project partners are: Würzburg / Germany (as Coordinator), Ulm and Stuttgart / Germany, Moscow and St. Petersburg / Russia, Vienna / Austria, Krakow / Poland, Tallin / Estonia,
Turku / Finland.

05/21/2015

Congratulations to Katrin Anneser, ZAE Bayern and EP6. Her project "Development of an energy efficient solar energy storage system based on a printed solar cell and supercapacitor" will be funded by Deutsche Bundesumweltstiftung (DBU).

05/19/2015
"Engineering near infrared single photon emitters with optically active spins in ultrapure silicon carbide"

Our new publication on room-temperature single-emitters based on spin centers in SiC: The work entitled "Engineering near infrared single photon emitters with optically active spins in ultrapure silicon carbide" has been accepted for publication in Nature Communications. Have a look at the preprint at arXiv:1407.7065.

05/19/2015

The German Research Council (DFG) established a new Research Training Group (GRK2112) Molecular Biradicals: Structure, Properties and Reactivity, in which EP6 is participating. See also the press release of the University of Würzburg (in German).

  1. Reversible spin-optical interface in luminescent organic radicals
    S. Gorgon, K. Lv, J. Grüne, B. H. Drummond, W. K. Myers, G. Londi, G. Ricci, D. Valverde, C. Tonnelé, P. Murto, A. S. Romanov, D. Casanova, V. Dyakonov, A. Sperlich, D. Beljonne, Y. Olivier, F. Li, R. H. Friend & E. W. Evans
    Nature 620, 538–544 (2023). [DOI:10.1038/s41586-023-06222-1]
  2. Understanding the Role of Triplet-Triplet Annihilation in Non-Fullerene Acceptor Organic Solar Cells
    L. J. F. Hart, J. Grüne, W. Liu, Tsz-ki Lau, J. Luke, Yi-Chun Chin, X. Jiang, H. Zhang, D. J.C. Sowood, D. M. L. Unson, Ji-Seon Kim, X. Lu, Y. Zou, F. Gao, A. Sperlich, V. Dyakonov, J. Yuan and A. J. Gillett
    Adv. Energy Mater. 2301357 (2023). [DOI:10.1002/aenm.202301357]
  3. Coupling spin defects in hexagonal boron nitride to a microwave cavity
    T. N. Tran, A. Gale, B. Whitefield, V. Dyakonov, M. Toth, I. Aharonovich, and M. Kianinia
    Appl. Phys. Lett. 123, 031102 (2023). [DOI:10.1063/5.0156551]
  4. Low Temperature Optical Properties of Novel Lead-Free Cs2NaFeCl6 Perovskite Single Crystals
    M. Armer, P. Dörflinger, A. Weis, C. Büchner, A. Gottscholl, J. Höcker, K. Frank, L. Nusser, M. T. Sirtl, B. Nickel, Th. Bein, and V. Dyakonov
    Adv. Photonics Res. 4, 2300017 (2023). [DOI:0.1002/adpr.202300017]

  1. Triplet Excitons and associated Efficiency-Limiting Pathways in Organic Solar Cell Blends based on (Non-) Halogenated PBDB-T and Y-Series
    J. Grüne, G. Londi, A. J. Gillett, B. Stähly, S. Lulei, M. Kotova, Y. Olivier, V. Dyakonov, and A. Sperlich
    Adv. Funct. Mater (2022). [DOI:10.1002/adfm.202212640]
     
  2. Heterovalent tin alloying in layered MA3Sb2I9 thin films: assessing the origin of enhanced absorption and self-stabilizing charge states
    A. Weis, P. Ganswindt, W. Kaiser, H. Illner, C. Maheu, N. Glück, P. Dörflinger, M. Armer, V. Dyakonov, J. P. Hofmann, E. Mosconi, F. De Angelis, and Th. Bein
    J. Phys. Chem. C (2022). [DOI: 10.1021/acs.jpcc.2c06106]
     
  3. Intricacies and Mechanism of p‐Doping Spiro‐MeOTAD Using Cu(TFSI)2 
    A. Hochgesang, S. Biberger, J. Grüne, J. Mohanraj, F.-J. Kahle, V. Dyakonov, A. Köhler, M. Thelakkat
    Adv. Electronic Mater. (2022). [DOI: 10.1002/aelm.202200113]
     
  4. The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap
    E. Kirstein, D. R. Yakovlev, M. M. Glazov, E. A. Zhukov, D. Kudlacik, I. V. Kalitukha, V. F. Sapega, G. S. Dimitriev, M. A. Semina, M. O. Nestoklon, E. L. Ivchenko, N. E. Kopteva, D. N. Dirin, O. Nazarenko, M. V. Kovalenko, A. Baumann, J. Höcker, V. Dyakonov and M. Bayer
    Nature Commun. (2022). [DOI: 10.1038/s41467-022-30701-0]
     
  5. Superradiance of spin defects in Silicon Carbide for Maser applications
    A. Gottscholl, M. Wagenhöfer, M. Klimmer, S. Scherbel, C. Kasper, V. Baianov, G. V. Astakhov, V. Dyakonov, and A. Sperlich
    Front. Photon. (2022). [DOI: 10.3389/fphot.2022.886354]
     
  6. Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules
    Y. Ding, B. Ding, H. Kanda, O. J. Usiobo, T. Gallet, Zh. Yang, Y. Liu, H. Huang, J. Sheng, Ch. Liu, Y. Yang, V. I. E. Queloz, X. Zhang, J.-N. Audinot, A. Redinger, W. Dang, E. Mosconic, W. Luo, F. De Angelis, M. Wang, P. Dörflinger, M. Armer, V. Schmid, R. Wang, K. G. Brooks, J. Wu, V. Dyakonov, G. Yang, S. Dai, P. J. Dyson & M. K. Nazeeruddin
    Nature Nanotechnol. (2022). [DOI: 10.1038/s41565-022-01108-1]
     
  7. Spin Dynamics of Electrons and Holes Interacting with Nuclei in MAPbI3 Perovskite Single Crystals
    E. Kirstein, D.R. Yakovlev, E.A. Zhukov, J. Höcker, V. Dyakonov, and M. Bayer
    ACS Photonics 9, 1375−1384 (2022). [DOI: 10.1021/acsphotonics.2c00096]
     
  8. Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized VB– Spin States in hBN
    F.F. Murzakhanov, G.V. Mamin, S.B. Orlinskii, U. Gerstmann, W.G. Schmidt, T. Biktagirov, I. Aharonovich, A. Gottscholl, A. Sperlich, V. Dyakonov, and V.A. Soltamov
    Nano Letters (2022). [DOI: 10.1021/acs.nanolett.1c04610]
     
  9. Spin Defects in Hexagonal Boron Nitride for Strain Sensing on Nanopillar Arrays
    T. Yang, N. Mendelson, C. Li, A. Gottscholl, J. Scott, M. Kianinia, V. Dyakonov, M. Toth, and I. Aharonovich
    Nanoscale (2022). [DOI: 10.1039/D1NR07919K]
     
  10. Geminate and Nongeminate Pathways for Triplet Exciton Formation in Organic Solar Cells
    A. Privitera, J. Grüne, A. Karki, W. K. Myers, V. Dyakonov, T.-Q. Nguyen, M. K. Riede, R. H. Friend, A. Sperlich, and A. J. Gillett
    Adv. Energy Mater. 2103994 (2022). [DOI: 10.1002/aenm.202103944]
     
  11. Predicting Solar Cell Performance from Terahertz and Microwave Spectroscopy
    H. Hempel, T. J. Savenjie, M. Stolterfoht, J. Neu, M. Failla, V. C. Paingad, P. Kužel, E. J. Heilweil, J. A. Spies, M. Schleuning, J. Zhao, D. Friedrich, K. Schwarzburg, L. D.A. Siebbeles, P. Dörflinger, V. Dyakonov, R. Katoh, M. J. Hong, J. G. Labram, M. Monti, E. Butler-Caddle, J. Lloyd-Hughes, M. M. Taheri, J. B. Baxter, T. J. Magnanelli, S. Luo, J. M. Cardon, S. Ardo, Th. Unold
    Adv. Energy Mater. 2102776 (2022). [DOI: 10.1002/aenm.202102776]
     
  12. Photon echo polarimetry of excitons and biexcitons in a CH3NH3PbI3 perovskite single crystal
    A. V. Trifonov, S. Grisard, A. N. Kosarev, I. A. Akimov, D. R. Yakovlev, J. Höcker, V. Dyakonov, and M. Bayer
    ACS Photonics 9, 621-629 (2022). [DOI: 10.1021/acsphotonics.1c01603]
     
  13. 2D/3D Hybrid Cs2AgBiBr6 Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact-Selectivity and Large Open Circuit Voltage
    M. Sirtl, R. Hooijer, M. Armer, F. G. Ebadi, M. Mohammadi, C. Maheu, A. Weis, B. T. van Gorkom, S. Häringer, R. A. J. Janssen, Th. Mayer, V. Dyakonov, W. Tress and Th. Bein
    Adv. Energy Mater. 12, 2103215 (2022) [DOI: 10.1002/aenm.202103215]

  1. Influence of crystallisation on structural and optical properties of lead-free Cs2AgBiBr6 perovskite crystals
    M. Armer, J. Höcker, C. Büchner, S. Häfele, P. Dörflinger, M. Sirtl, K. Tvingstedt, Th. Bein, V. Dyakonov
    CrystEngComm 23 (39), 6848-6854 (2021) [DOI: 10.1039/D1CE00844G]
     
  2. Charge Transfer in Ternary Solar Cells Employing Two Fullerene Derivatives: Where do Electrons Go?
    A. Sperlich, M. Auth, V. Dyakonov
    Israel Journal of Chemistry 61, 1 – 9 (2021) [DOI: 10.1002/ijch.202100064]
     
  3. Long-lived spin-polarized intermolecular exciplex states in thermally activated delayed fluorescence-based organic light-emitting diodes
    S. Weissenseel, A. Gottscholl, R. Bönnighausen, V. Dyakonov, A. Sperlich
    Sci. Adv. 7 (47), eabj9961 (2021) [DOI: 10.1126/sciadv.abj9961]
     
  4. Detecting Triplet States in Opto-Electronic and Photovoltaic Materials and Devices by Transient Optically Detected Magnetic Resonance
    J. Grüne, V. Dyakonov, A. Sperlich
    Mater. Horiz. (2021) [DOI: 10.1039/D1MH00999K]
     
  5. Spin defects in hBN as promising temperature, pressure and magnetic field quantum sensors
    A. Gottscholl, M. Diez, V. Soltamov, C. Kasper, D. Krauße, A. Sperlich, M. Kianinia, C. Bradac, I. Aharonovich, V. Dyakonov
    Nat. Commun. 12, 4480 (2021).  [DOI: 10.1038/s41467-021-24725-1]
     
  6. Coupling Spin Defects in Hexagonal Boron Nitride to Monolithic Bullseye Cavities
    J. E. Fröch, L. P. Spencer, M. Kianinia, D. D. Totonjian, M. Nguyen, A. Gottscholl, V. Dyakonov, M. Toth, S. Kim, and I. Aharonovich
    Nano Letters (2021). [DOI: 10.1021/acs.nanolett.1c01843]
     
  7. Assigning ionic properties in perovskite solar cells; a unifying transient simulation/experimental study

    M. Fischer, D. Kiermasch, L. G. Escrig, H. J. Bolink, V. Dyakonov, K. Tvingstedt
    Sustain. Energy Fuels 5, 3578-3587 (2021) [DOI: 10.1039/d1se00369k]

  8. The Role of Spin in the Degradation of Organic Photovoltaics
    I. Ramirez, A. Privitera, S. Karuthedath, A. Jungbluth, J. Benduhn, A. Sperlich, D. Spoltore, K. Vandewal, F. Laquai, M. Riede
    Nat. Commun. 12, 471 (2021) [DOI: 10.1038/s41467-020-20601-6]

  9. Electron Spin as a Fingerprint for Charge Generation and Transport in Doped Organic Semiconductors
    A. Privitera, R. Warren, G. Londi, P. Keinburg, J. Liu, A. Sperlich, A. Lauritzen, O. Thimm, A. Ardavan, D. Beljonne, M. Riede
    J. Mater. Chem. C, 9, 2944 (2021) [DOI: 10.1039/D0TC06097F]

  10. Femtosecond Dynamics of Diphenylpropynylidene in Ethanol and Dichloromethane
    L. Ress, D. Kaiser, J. Grüne, M. Gerlach, E. Reusch, T. Brixner, A. Sperlich, B. Engels, I. Fischer
    Spectroch. Acta A, 254, 119606 (2021) [DOI: 10.1016/j.saa.2021.119606]

  11. Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride
    A. Gottscholl , M. Diez , V. Soltamov , C. Kasper , A. Sperlich , M. Kianinia , C. Bradac , I. Aharonovich, V. Dyakonov
    Sci. Adv. (2021) [DOI: 10.1126/sciadv.abf3630]
     
  12. Temperature-reduced and Rapid Growth of Hybrid Perovskite Single Crystals with Primary Alcohols
    J. Höcker, F. Brust, M. Armer, V. Dyakonov
    Cryst. Eng. Comm. (2021). [DOI: 10.1039/D0CE01759K]     
     
  13. Highly conducting Wurster-type twisted covalent organic frameworks
    J. M. Rotter, R. Guntermann, M. Auth, A. Mähringer, A. Sperlich, V. Dyakonov, D. D. Medina, T. Bein
    Chem. Sci., Advance Article ( 2021) [DOI: 10.1039/D0SC03909H]
     
  14. Spin- and Voltage-dependent emission from Intra- and Intermolecular TADF OLEDs
    N. Bunzmann, B. Krugmann, S. Weissenseel, L. Kudriashova, K. Ivaniuk, P. Stakhira, V. Cherpak, M. Chapran, G. Grybauskaite-Kaminskiene, J. V. Grazulevicius, V. Dyakonov, A. Sperlich
    Adv. Electronic. Mater., 7, 3, 2000702 (2021) [DOI: 10.1002/aelm.202000702]

  1. Optoelectronic Properties of Cs2AgBiBr6 Thin Films: The Influence of Precursor Stoichiometry
    M. T. Sirtl, M. Armer, L. K. Reb, R. Hooijer, P.  Dörflinger, M. A. Scheel, K. Tvingstedt, P. Rieder, N. Glück, P. Pandit, S.V. Roth, P. Müller-Buschbaum, V. Dyakonov, T. Bein
    ACS Appl. Energy Mater. (2020) [DOI: 10.1021/acsaem.0c01308]
     
  2. Thermal Activation Bottleneck in TADF OLEDs based on m-MTDATA:BPhen
    N. Bunzmann, D. L. Baird, H. Malissa, S. Weissenseel, C. Boehme, V. Dyakonov, A. Sperlich
    [arXiv: 2008.05781]
     
  3. Identifying carbon as the source of visible single-photon emission from hexagonal boron nitride

    N. Mendelson, D. Chugh, J. R. Reimers, T. S. Cheng, A. Gottscholl, H. Long, C. J. Mellor, A. Zettl, V. Dyakonov, P. H. Beton, S. V. Novikov, C. Jagadish, H. H. Tan, M. J. Ford, M. Toth, C. Bradac, I. Aharonovich
    Nature Materials (2020) [DOI: 10.1038/s41563-020-00850-y]

  4. Kinetic Modeling of Transient Electroluminescence reveals TTA as an Efficiency-Limiting Process in Exciplex-Based TADF OLEDs
    J. Grüne, N. Bunzmann, M. Meinecke, V. Dyakonov, A. Sperlich
    J. Phys. Chem. C, 124, 47, 25667 (2020) [DOI: 10.1021/acs.jpcc.0c06528]

  5. Impact of Pressure and Temperature on the Compaction Dynamics and Layer Properties of Powder Pressed Methylammonium Lead Halide Thick Films
    C. Witt, A. Schmid, N. Leupold, M. Schultz, J. Höcker, A. Baumann, R. Moos, F. Panzer
    ACS Appl. Electron. Mater. (2020), [DOI: 10.1021/acsaelm.0c00493]
     
  6. Seed crystal free growth of high-quality double cation – double halide perovskite single crystals for optoelectronic applications
    J. Höcker, M. Ozcan, S. Hammer, M. Fischer, B. Bichler, M. Armer, P. Rieder, V. Drach, J. Pflaum, B. Nickel, V. Dyakonov,
    J. Mater. Chem. C, Advance Article  (2020) [DOI: 10.1039/D0TC01617A]
     
  7. Temperature dependence of the spectral line-width of charge-transfer state emission in organic solar cells; static vs. dynamic disorder
    K. Tvingstedt, J. Benduhn, K. Vandewal 
    Mater. Horiz. (2020) [DOI: 10.1039/d0mh00385a]
     
  8. Influence of Irradiation on Defect Spin Coherence in Silicon Carbide
    C. Kasper, D. Klenkert, Z. Shang, D. Simin, A. Gottscholl, A. Sperlich,  H. Kraus, C. Schneider, S. Zhou,M. Trupke, W. Kada, T. Ohshima, V. Dyakonov, and G. V. Astakhov
    Phys. Rev. Applied 13, 044054 (2020) [DOI: 10.1103/PhysRevApplied.13.044054]
     
  9. On the Absence of Triplet Exciton Loss Pathways in Non-Fullerene Acceptor based Organic Solar Cells
    M. S. Kotova, G. Londi, J. Junker, S. Dietz, A. Privitera, K.Tvingstedt, D. Beljonne, A. Sperlich, V. Dyakonov
    Mater. Horiz. (2020) [DOI: 10.1039/d0mh00286k]
     
  10. Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
    A. Gottscholl, M. Kianinia, V. Soltamov, C. Bradac, C. Kasper, K. Krambrock, A. Sperlich, M. Toth, I. Aharonovich, V. Dyakonov
    Nature Materials, (2020) [DOI: 10.1038/s41563-020-0619-6]
     
  11. Optically and electrically excited intermediate electronic states in donor:acceptor based OLEDs
    N. Bunzmann, . Weißenseel, L. Kudriashova, J. Grüne, B. Krugmann, J. V. Grazulevicius, A. Sperlich, V. Dyakonov
    Materials Horizons, (2020) [DOI: 10.1039/C9MH01475F]

  1. Getting the Right Twist: Influence of Donor–Acceptor Dihedral Angle on Exciton Kinetics and Singlet–Triplet Gap in Deep Blue Thermally Activated Delayed Fluorescence Emitter
    S. Weissenseel, N. A. Drigo, L. G. Kudriashova, M. Schmid, T. Morgenstern, K.H. Lin, A. Prlj, C. Corminboeuf, A. Sperlich, W. Brütting, M. K. Nazeeruddin, V. Dyakonov
    J. Phys. Chem. C, 2019 [DOI: 10.1021/acs.jpcc.9b08269]

  2. Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Films
    V. M. Caselli, M. Fischer, D. Meggiolaro, E. Mosconi, F. D. Angelis, S. D. Stranks, A. Baumann, V. Dyakonov, E. M. Hutter, T. J. Savenije
    J.Phys.Chem.Lett. (2019), 10, 5128−5134 [DOI: 10.1021/acs.jpclett.9b02160]

  3. Unravelling steady-state bulk recombination dynamics in thick efficient vacuum-deposited perovskite solar cells by transient methods
    D. Kiermasch, L. Gil-Escrig, A. Baumann, H. J. Bolink, V. Dyakonov, K. Tvingstedt
    J. Mater. Chem. A, (2019) ,7, 14712-14722 [DOI 10.1039/c9ts04367e ]

  4. Excitation and coherent control of spin qudit modes in silicon carbide at room temperature
    V. A. Soltamov, C. Kasper, A. V. Poshakinskiy, A. N. Anisimov, E. N. Mokhov, A. Sperlich, S. A. Tarasenko, P. G. Baranov, G. V. Astakhov, V. Dyakonov
    Nature Communications 10, 1678 (2019) [DOI: 10.1038/s41467-019-09429-x]

  5. Minimizing geminate recombination losses in small-molecule-based organic solar cells
    R. Sandoval-Torrientes, A. Gavrik, A. Isakova, A. Abudulimu, J. Calbo,d  Juan Aragó, J. Santos, E. Ortí, N. Martín,V. Dyakonov L. Lüer
    J. Mater. Chem. C, 2019, [DOI: 10.1039/c9tc00862d]

  6. Favorable Mixing Thermodynamics in Ternary Polymer Blends for Realizing High Efficiency Plastic Solar Cells
    N. Gasparini, S. Kahmann, M. Salvador, J. D. Perea, A. Sperlich, A. Baumann, N. Li, S. Rechberger, E. Spiecker, V. Dyakonov, G. Portale, M. A. Loi, C. J. Brabec, and Tayebeh Ameri
    Adv. Energy Mater. 2019, 1803394 [DOI: 10.1002/aenm.201803394]

  7.  Near‐infrared quadrupolar chromophores combining three‐coordinate boron‐based superdonor and ‐acceptor units  
    T. Stennett, P. Bissinger, S. Griesbeck, S. Ullrich, I. Krummenacher, M. Auth, A. Sperlich, M. Stolte, K. Radacki, C.-J. Yao, F. Würthner, A. Steffen, T. Marder, H. Braunschweig
    Angew. Chem. Int. Ed., 2019, [DOI: 10.1002/anie.201900889]     

  8.  Effects of Masking on Open-Circuit Voltage and Fill Factor in Solar Cells
    D. Kiermasch, L. Gil, H. J. Bolink, K. Tvingstedt
    Joule,  2019, 3 (1), 16-26, [DOI: 10.1016/j.joule.2018.10.016]        

  1. Stimulus-Triggered Formation of an Anion-Cation Exciplex in Copper(I) Complexes as a Mechanism for Mechanochromic Phosphorescence
    B. Hupp, J. Nitsch, T. Schmitt, R. Bertermann, K. Edkins, F. Hirsch, I. Fischer, M. Auth, A. Sperlich, A. Steffen
    Angew. Chem. Int. Ed. 2018, 57, 13671 (2018) [DOI: 10.1002/anie.201807768] 
        

  2. Doping Profile in Planar Hybrid Perovskite Solar Cells Identifying Mobile Ions
    M. Fischer, K. Tvingstedt, A. Baumann, and V. Dyakonov
    ACS Appl. Energy Mater. 2018,  1, 10, 5129-5134 (2018) [DOI: 10.1021/acs.jpcc.8b08716]

  3. Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence
    N. A. Drigo, L. G. Kudriashova, S. Weissenseel, A. Sperlich, A. J. Huckaba, M. K. Nazeeruddin, and V. Dyakonov,
    J. Phys. Chem. C 2018,  122, 39, 22796-22801(2018) [DOI: 10.1021/acs.jpcc.8b08716]

  4. Creation of Silicon Vacancy in Silicon Carbide by Proton Beam Writing toward Quantum Sensing Applications
    T. Ohshima, T. Satoh, H. Kraus, G. V. Astakhov, V. Dyakonov, and P. G. Baranov,
    J. Phys. D: Appl. Phys., 51(33), 333002 (2018) [DOI: 10.1088/1361-6463/aad0ec ]

  5. Highly Efficient Optical Pumping of Spin Defects in Silicon Carbide for Stimulated Microwave Emission
    M. Fischer, A. Sperlich,  H. Kraus,  T. Ohshima,  G. V. Astakhov,  and V. Dyakonov,
    Phys. Rev. Applied 9, 054006 (2018) [DOI: 10.1103/PhysRevApplied.9.054006 ]

  6. Influence of Fermi Level Alignment with Tin Oxide on the Hysteresis of Perovskite Solar Cells
    M. F. Aygüler, A. G. Hufnagel, P. Rieder, M. Wussler, W. Jaegermann, T. Bein, V. Dyakonov, M. L. Petrus, A. Baumann, and P. Docampo,
    ACS Appl. Mater. Interfaces 10, 11414-11419 (2018) [DOI: 10.1021/acsami.8b00990]

  7. Room-Temperature Level Anticrossing and Cross-Relaxation Spectroscopy of Spin Color Centers in SiC Single Crystals and Nanostructures
    A. N. Anisimov, V. A. Soltamov, E. N. Mokhov, P. G. Baranov, G. A. Astakhov and V. Dyakonov,
    Appl. Magn. Res. 49, 85-95 (2018) [DOI: 10.1007/s00723-017-0938-1]

  8. Single-crystal-like optoelectronic-properties of MAPbI3 perovskite polycrystalline thin films
    N. Giesbrecht, J. Schlipf, I. Grill, P. Rieder, V. Dyakonov, T. Bein, A. Hartschuh, P. Müller-Buschbaum, P. Docampo
    J. Mater. Chem. A, 2018,6, 4822-4828 (2018) [DOI: 10.1039/C7TA11190H ]

  9. Understanding the Role of Cesium and Rubidium Additives in Perovskite Solar Cells: Trap States, Charge Transport and Recombination
    Y. Hu, E. M. Hutter, P. Rieder, I. Grill, J. Hanisch, M. F. Aygüler, A. G. Hufnagel, M. Handloser, E. Ahlswede, Th. Bein, A. Hartschuh, K. Tvingstedt, V. Dyakonov, A. Baumann, T. J. Savenije, M. L. Petrus, P. Docampo
    Adv. Energy Mater. 2018, 8, 1703057 (2018) [DOI: 10.1002/aenm.201703057]

  10. Revisiting lifetimes from transient electrical characterization of thin film solar cells; a capacitive concern evaluated for silicon, organic and perovskite devices
    D. Kiermasch, A. Baumann, M. Fischer, V. Dyakonov, K. Tvingstedt

    Energy Environ. Sci., 2018,11, 629-640 (2018) [DOI: 10.1039/C7EE03155F]

     

     

  1. Impact of Tortuosity on Charge-Carrier Transport in Organic Bulk Heterojunction Blends

    M. C. Heiber, K. Kister, A. Baumann, V. Dyakonov, C. Deibel, T. Q. Nguyen,
    Phys. Rev. Appl. 8, 054043 (2017). [DOI: 10.1103/PhysRevApplied.8.054043]

  2. Impact of Interfaces and Laser Repetition Rate on Photocarrier Dynamics in Lead Halide Perovskites

    L. G. Kudriashova, D.Kiermasch, P. Rieder, M. Campbell, K. Tvingstedt, A. Baumann, G. V. Astakhov, V. Dyakonov
    J. Phys. Chem. Lett. 8, 4698−4703 (2017), [DOI: 10.1021/acs.jpclett.7b02087]

  3. Vibrational Spectroscopy of a Low Band Gap Donor-Acceptor Copolymer and Blends
    F. Fuchs, S. Schmitt, Ch. Walter, B. Engels, E.-M. Herzig, P. Muller-Buschbaum, V.Dyakonov, C. Deibel,
    J. Phys. Chem. C 121, 19543–19547 (2017), [DOI: 10.1021/acs.jpcc.7b03429]

  4. Carbon Nanoforms for Photovoltaics
    V. Dyakonov, J. L. Delgado,
    Adv. Energy Mater. 7, 170025 (2017), [DOI: 10.1002/aenm.201700252]

  5. Room-temperature level anticrossing and cross-relaxation spectroscopy of spin color centers in SiC single crystals and nanostructures
    A. N. Anisimov, V. A. Soltamov, E. N. Mokhov, P. G. Baranov, G. V. Astakhov and V. Dyakonov,
    Appl. Magn. Reson. (2017), [DOI: 10.1007/s00723-017-0938-1]

  6. Spin and optical properties of silicon vacancies in silicon carbide – a review
    S. A. Tarasenko, A. V. Poshakinskiy, D. Simin, V. A. Soltamov, E. N. Mokhov, P. G. Baranov, V. Dyakonov, and G. V. Astakhov,
    Phys. Status Solidi B, 1700258 (2017), [DOI: 10.1002/pssb.201700258]

  7. Removing Leakage and Surface Recombination in Planar Perovskite Solar Cells
    Kristofer Tvingstedt, Lidón Gil-Escrig, Cristina Momblona, Philipp Rieder, David Kiermasch, Michele Sessolo, Andreas Baumann, Henk J. Bolink and Vladimir Dyakonov,
    ACS Energy Lett. 2, 424 (2017), [DOI: 10.1021/acsenergylett.6b00719] 

  8. Locking of electron spin coherence above 20 ms in natural silicon carbide
    D. Simin, H. Kraus, A. Sperlich, T. Ohshima, G. V. Astakhov, and V. Dyakonov
    Phys. Rev. B 95, 161201(R) (2017), [DOI: 10.1103/PhysRevB.95.161201]  

  9. Three-Dimensional Proton Beam Writing of Optically Active Coherent Vacancy Spins in Silicon Carbide
    H. Kraus, D. Simin, C. Kasper, Y. Suda, S. Kawabata, W. Kada, T. Honda, Y. Hijikata, T. Ohshima, V. Dyakonov, and G. V. Astakhov,
    Nano Lett., 17 (5), pp 2865–2870 (2017), [DOI:10.1021/acs.nanolett.6b05395]

  10. Intrinsic non-radiative voltage losses in fullerene-based organic solar cells
    Johannes Benduhn, Kristofer Tvingstedt, Fortunato Piersimoni, Sascha Ullbrich, Yeli Fan, Manuel Tropiano, Kathryn A. McGarry, Olaf Zeika, Moritz K. Riede, Christopher J. Douglas, Stephen Barlow, Seth R. Marder, Dieter Neher, Donato Spoltore, Koen Vandewal
    Nature Energy 2, Article number: 17053 (2017) [DOI:10.1038/nenergy.2017.53]

  11. Observation of the universal magnetoelectric effect in a 3D topological insulator V. Dziom, A. Shuvaev, A. Pimenov, G. V. Astakhov, C. Ames, K. Bendias, J. Böttcher, G. Tkachov, E. M. Hankiewicz, C. Brüne, H. Buhmann, and L. W. Molenkamp Nat. Comm. 8, 15197 (2017) [DOI: 10.1038/ncomms15197]

  1. Improved charge carrier lifetime in planar perovskite solar cells by bromine doping
    David Kiermasch, Philipp Rieder, Kristofer Tvingstedt, Andreas Baumann, Vladimir Dyakonov
    Sci. Rep., 6, 39333 (2016), [doi:10.1038/srep39333]

  2. Triplet Excitons in Highly Efficient Solar Cells Based on the Soluble Small Molecule p-DTS(FBTTh2)2
    Stefan Väth, Kristofer Tvingstedt, Andreas Baumann, Michael C. Heiber, Andreas Sperlich, John A. Love, Thuc-Quyen Nguyen, Vladimir Dyakonov
    Adv. Energy Mater., accepted (2016), [doi:10.1002/aenm.201602016]

  3. Direct Observation of Spin States involved in Organic Electroluminescence Based on Thermally Activated Delayed Fluorescence
    Stefan Väth, Kristofer Tvingstedt, Michael Auth, Andreas Sperlich, Asta Dabuliene, Juozas V. Grazulevicius, Pavlo Stakhira, Vladyslav Cherpak, Vladimir Dyakonov
    Adv. Optical Mater., accepted (2016), [doi:10.1002/adom.201600926]

  4. Optical thermometry based on level anticrossing in silicon carbide
    Andrey Anisimov, Dmitrij Simin, Victor Soltamov, Sergey Lebedev, Pavel Baranov, Georgy V. Astakhov, Vladimir Dyakonov
    Sci. Rep. 6, 33301 (2016), [doi:10.1038/srep33301]

  5. All-optical dc nanotesla magnetometry using silicon vacancy fine structure in isotopically purified silicon carbide
    D. Simin, V. A. Soltamov, A. V. Poshakinskiy, A. N. Anisimov, R. A. Babunts, D. O. Tolmachev, E. N. Mokhov, M. Trupke, S. A. Tarasenko, A. Sperlich, P. G. Baranov, V. Dyakonov and G. V. Astakhov
    Phys. Rev. X 6, 031014 (2016), [doi:10.1103/PhysRevX.6.031014], [arXiv:1511.04663]

  6. Analysis of Triplet Exciton Loss Pathways in PTB7:PC71BM Bulk Heterojunction Solar Cells
    Hannes Kraus, Michael C. Heiber, Stefan Väth, Julia Kern, Carsten Deibel, Andreas Sperlich and Vladimir Dyakonov
    Sci. Rep. 6, 29158 (2016), [doi:10.1038/srep29158]

  7. Spin Physics, Spin Chemistry and Spin Technology
    P. Baranov, V. Dyakonov
    Appl. Magn. Reson. 47, 7, 655 (2016), [doi:10.1007/s00723-016-0802-8]

  8. Spin Centres in SiC for Quantum Technologies
    G. V. Astakhov, D. Simin, V. Dyakonov, B. V. Yavkin, S. B. Orlinskii, I. I. Proskuryakov, A. N. Anisimov, V. A. Soltamov and P. G. Baranov
    Appl. Magn. Reson. 1-20 (2016), [doi:10.1007/s00723-016-0800-x]

  9. Temperature Dependence of Ideality Factors in Organic Solar Cells and the Relation to Radiative Efficiency
    Kristofer Tvingstedt and Carsten Deibel
    Adv. Energy Mater., 6, 1502230 (2016) [doi:10.1002/aenm.201502230]

  10. Symmetry properties of n-doped (Cd,Mn)Te quantum well photoluminescence spectra: An exemplary evidence for anisotropy-induced valence-band mixing
    A. V. Koudinov, C. Kehl, G. Astakhov, J. Geurts, T. Wojtowicz and G. Karczewski
    Appl. Phys. Lett. 108, 191113 (2016), [doi:10.1063/1.4949531] 

  1. Atomic-Scale Defects in Silicon Carbide for Quantum Sensing Applications
    V. Dyakonov, H. Kraus, V. A. Soltamov, F. Fuchs, D. Simin, S. Vaeth, A. Sperlich, P. Baranov, G. Astakhov
    Materials Science Forum, 821-823, 355-358, (2015), [doi:10.4028/www.scientific.net/MSF.821-823.355]

  2. Light-induced electron spin resonance study of galvinoxyl-doped P3HT/PCBM bulk heterojunctions
    Jung Min Cho, Dong Soo Kim, Sungwoo Bae, Sang-Jin Moon, Won Suk Shin, Dong Hun Kim, Sun Hee Kim, Andreas Sperlich, Stefan Väth, Vladimir Dyakonov, Jung-Keun Lee
    Organic Electronics 27, 119 (2015), [doi:10.1016/j.orgel.2015.08.032]

  3. High precision angle-resolved magnetometry with uniaxial quantum centers in silicon carbide
    D. Simin, F. Fuchs, H. Kraus, A. Sperlich, P. G. Baranov, G. V. Astakhov, V. Dyakonov
    Phys. Rev. Appl. 4, 014009 (2015), [doi:10.1103/PhysRevApplied.4.014009] [arXiv:1505.00176]

  4. Identification of Trap States in Perovskite Solar Cells
    Andreas Baumann, Stefan Väth, Philipp Rieder, Michael Heiber, Kristofer Tvingstedt, Vladimir Dyakonov
    J. Phys. Chem. Lett. 6, 2350 (2015), [doi:10.1021/acs.jpclett.5b00953]

  5. Engineering near infrared single photon emitters with optically active spins in ultrapure silicon carbide
    F. Fuchs, B. Stender, M. Trupke, D. Simin, J. Pflaum, V. Dyakonov, G. V. Astakhov
    Nat. Comm. 6, 7578 (2015), [doi:10.1038/ncomms8578] [arXiv:1407.7065]

  6. Encounter-Limited Charge-Carrier Recombination in Phase-Separated Organic Semiconductor Blends
    M. C. Heiber, C. Baumbach, V. Dyakonov and C. Deibel
    Phys. Rev. Lett. 114, 136602 (2015), [doi:10.1103/PhysRevLett.114.136602]

  7. Conducting materials prepared by the oxidation of p-phenylenediamine with p-benzoquinone
    J. Stejskal, M. Trchová, Z. Morávková, P. Bober M. Bláha, J. Pfleger, P. Magdziarz, J. Prokes, M. Havlicek, N. S. Sariciftci A. Sperlich, V. Dyakonov and Zoran Zujovic
    J. Solid State Electrochem. 19, 9, 2653 (2015), [doi:10.1007/s10008-015-2838-3]

  8. The Effect of Diiodooctane on the Charge Carrier Generation in Organic Solar Cells Based on the Copolymer PBDTTT-C
    A. Zusan, B. Gieseking, M. Zerson, V. Dyakonov, R. Magerle and C. Deibel
    Sci. Rep. 5, 8286 (2015), [doi:10.1038/srep08286]

  9. Photoinduced Dynamics of Charge Separation: from Photosynthesis to Polymer-Fullerene Bulk-Heterojunctions
    J. Niklas, S. Beaupré, M. Leclerc, T. Xu, L. Yu, V. Dyakonov, A. Sperlich and O. G. Poluektov
    J. Phys. Chem. B 119, 24, 7407 (2015), [doi:10.1021/jp511021v] 

  1. Room-temperature near-infrared silicon carbide nanocrystalline emitters based on optically aligned spin defects
    A. Muzha, F. Fuchs, N. V. Tarakina, D. Simin, M. Trupke, V. A. Soltamov, E. N. Mokhov, P. G. Baranov, V. Dyakonov, A. Krueger, G. V. Astakhov
    Appl. Phys. Lett. 105, 243112 (2014),[doi:10.1063/1.4904807] [arXiv:1409.0756]

  2. Angle-Resolved Photoemission Spectroscopy of Tetragonal CuO: Evidence for Intralayer Coupling Between Cupratelike Sublattices
    S. Moser, L. Moreschini, H.-Y. Yang, D. Innocenti, F. Fuchs, N. H. Hansen, Y. J. Chang, K. S. Kim, A. L. Walter, A. Bostwick, E. Rotenberg, F. Mila and M. Grioni
    Phys. Rev. Lett. 113, 187001 (2014), [doi:10.1103/PhysRevLett.113.187001]

  3. Effects of Characteristic Length Scales on the Exciton Dynamics in Rubrene Single Crystals
    B. Gieseking, T. Schmeiler, B. Müller, C. Deibel, B. Engels, V. Dyakonov, J. Pflaum
    Phys. Rev. B 90, 205305 (2014), [doi:10.1103/PhysRevB.90.205305] [arXiv:1309.1107]

  4. Exciton Decay Dynamics Controlled by Impurity Occupation in Strongly Mn-Doped and Partially Compensated Bulk GaAs
    F. Münzhuber, T. Henn, T. Kiessling, W. Ossau, L. W. Molenkamp, B. Gieseking, G. V. Astakhov, V. Dyakonov
    Phys. Rev. B 90, 125203 (2014), [doi:10.1103/PhysRevB.90.125203]

  5. Stabilization of Aluminum Doped Zinc Oxide Nanoparticle Suspensions and their Application in Organic Solar Cells
    N. Wolf, T. Stubhan, J. Manara, V. Dyakonov and C. Brabec
    Thin Solid Films 564, 213 (2014), [doi:10.1016/j.tsf.2014.06.008]

  6. Radiative Efficiency of Lead Iodide Based Perovskite Solar Cells
    Kristofer Tvingstedt, Olga Malinkiewicz, Andreas Baumann, Carsten Deibel, Henry J. Snaith, Vladimir Dyakonov and Henk J. Bolink
    Sci. Rep. 4, 6071 (2014), [doi:10.1038/srep06071]

  7. Efficient Generation of Model Bulk Heterojunction Morphologies for Organic Photovoltaic Device Modeling
    Michael C. Heiber and Ali Dhinojwala
    Phys. Rev. Applied 2, 014008 (2014), [doi:10.1103/PhysRevApplied.2.014008]

  8. The Crucial Influence of Fullerene Phases on the Photogeneration in Organic Bulk Heterojunction Solar Cells
    A. Zusan, K. Vandewal, B. Allendorf, N. H. Hansen, J. Pflaum, A. Salleo, V. Dyakonov and C. Deibel
    Adv. Energy Mater. 4, 1400922 (2014), [doi:10.1002/aenm.201400922]

  9. Persistent Photovoltage in Methylammonium Lead Iodide Perovskite Solar Cells
    A. Baumann, K. Tvingstedt, M. C. Heiber, S. Väth, C. Momblona, H. J. Bolink, V. Dyakonov
    APL Mater. 2, 081501 (2014), [doi:10.1063/1.4885255], [arXiv:1406.4276]

  10. Magnetic field and temperature sensing with atomic-scale spin defects in silicon carbide
    H. Kraus, V. A. Soltamov, F. Fuchs, D. Simin, A. Sperlich, P. G. Baranov, G. V. Astakhov, V. Dyakonov
    Sci. Rep. 4, 5303 (2014), [doi:10.1038/srep05303], [arXiv:1403.7741]

  11. Band bending at the P3HT/ITO interface studied by Photoelectron Spectroscopy
    Martin Schneider, Alexander Wagenpfahl, Carsten Deibel, Vladimir Dyakonov, Achim Schöll and Friedrich Reinert
    Org. Electron. 15, 7, 1552 (2014), [doi:10.1016/j.orgel.2014.03.012]

  12. Distribution of charge carrier transport properties in organic semiconductors with Gaussian disorder
    Jens Lorrmann, Manuel Ruf, David Vocke, Vladimir Dyakonov and Carsten Deibel
    J. Appl. Phys. 115, 183702 (2014), [doi:10.1063/1.4875683]

  13. Nongeminate recombination in neat P3HT and P3HT:PCBM blend films
    J. Gorenflot, M. C. Heiber, A. Baumann, J. Lorrmann, M. Gunz, A. Kämpgen, V. Dyakonov and C. Deibel
    J. Appl. Phys. 115, 144502 (2014), [doi:10.1063/1.4870805] [arXiv:1403.7466v2]

  14. Excitation and recombination dynamics of vacancy-related spin centers in silicon carbide
    T. C. Hain, F. Fuchs, V. A. Soltamov, P. G. Baranov, G. V. Astakhov, T. Hertel and V. Dyakonov
    J. Appl. Phys. 115, 133508 (2014), [doi:10.1063/1.4870456] [arXiv:1403.2399]

  15. Electronic Structure of Fullerene Heterodimer in Bulk-Heterojunction Blends
    Oleg G. Poluektov, Jens Niklas, Kristy L. Mardis, Serge Beaupré, Mario Leclerc, Carmen Villegas, Sule Erten-Ela, Juan L. Delgado, Nazario Martín, Andreas Sperlich and Vladimir Dyakonov
    Adv. Energy Mater. 4, 7, 1301517 (2014), [doi:10.1002/aenm.201301517]
    UPDATE Our paper made it to the cover.

  16. Triplet-triplet exciton dynamics in single-walled carbon nanotubes
    Dominik Stich, Florian Späth, Hannes Kraus, Andreas Sperlich, Vladimir Dyakonov, and Tobias Hertel
    Nat. Photonics 8, 139 (2014) [doi:10.1038/nphoton.2013.316]

  17. Room temperature quantum microwave emitters based on spin defects in silicon carbide
    H. Kraus, V. A. Soltamov, D. Riedel, S. Väth, F. Fuchs, A. Sperlich, P. G. Baranov, V. Dyakonov and G. V. Astakhov
    Nat. Physics 10, 157 (2014) [doi:10.1038/nphys2826] 

  1. Room temperature electrically tunable terahertz Faraday effect
    A. M. Shuvaev, A. Pimenov, G. V. Astakhov, M. Mühlbauer, C. Brüne, H. Buhmann, aL. W. Molenkamp
    Appl. Phys. Lett. 102, 241902 (2013) [arXiv:1211.5569] [link]

  2. Effect of morphological changes on presence of trap states in P3HT:PCBM solar cells studied by cross sectional energy filtered TEM and thermally stimulated current measurements
    A. L. Domanski, I. Lieberwirth, E. Sengupta, K. Landfester, H.-J. Butt, R. Berger, J. Rauh, V. Dyakonov, C. Deibel
    J. Phys. Chem. C (2013) [link]

  3. Nongeminate and geminate recombination in PTB7:PC71BM solar cells
    A. Foertig, J. Kniepert, M. Gluecker, T. Brenner, V. Dyakonov, D. Neher, C. Deibel
    Adv. Funct. Mater. (2013) [link]

  4. Order of decay of mobile charge carriers in P3HT:PCBM solar cells
    C. Deibel, D. Rauh, and A. Foertig
    Appl. Phys. Lett. 103, 043307 (2013) [arXiv:1302.0367] [link]

  5. Highly-Efficient Charge Separation and Polaron Delocalization in Polymer-Fullerene Bulk-Heterojunctions: A Comparative Multi-Frequency EPR & DFT Study
    J. Niklas, K. L. Mardis, B. P. Banks, G. M. Grooms, A. Sperlich, V. Dyakonov, S. Beaupre, M. Leclerc, T. Xu, L. Yu, and O. G. Poluektov
    Phys. Chem. Chem. Phys. 15 (24), 9562, (2013) [arXiv:1305.6434] [link]

  6. Terahertz quantum Hall effect of Dirac fermions in a topological insulator
    A. M. Shuvaev, G. V. Astakhov, G. Tkachov, C. Brüne, H. Buhmann, L. W. Molenkamp, and A. Pimenov
    Phys. Rev. B 87, 121104(R) (2013) [arXiv:1208.1115] [link]

  7. Silicon carbide light-emitting diode as a prospective room temperature source for single photons
    F. Fuchs, V. A. Soltamov, S. Väth, P. G. Baranov, E. N. Mokhov, G. V. Astakhov, V. Dyakonov
    Sci. Rep. 3, 1637 (2013) [arXiv:1212.2989] [link]

  8. Distribution of charge carrier transport properties in organic semiconductors with Gaussian disorder
    Jens Lorrmann, Manuel Ruf, David Vocke, Vladimir Dyakonov, Carsten Deibel
    [arXiv:1209.1922] 

  1. Resonant addressing and manipulation of silicon vacancy qubits in silicon carbide
    D. Riedel, F. Fuchs, H. Kraus, S. Väth, A. Sperlich, V. Dyakonov, A. A. Soltamova, P. G. Baranov, V. A. Ilyin, and G. V. Astakhov
    Phys. Rev. Lett. 109, 226402 (2012) [arXiv:1210.0505] [link]

  2. Terahertz magneto-optical spectroscopy in HgTe thin films
    A. M. Shuvaev, G. V. Astakhov, C. Brüne, H. Buhmann, L. W. Molenkamp, and A. Pimenov
    Semicond. Sci. Technol. 27, 124004 (2012) [link]

  3. Nongeminate Recombination in Planar and Bulk Heterojunction Organic Solar Cells
    A. Foertig, A. Wagenpfahl, T. Gerbich, D. Cheyns, V. Dyakonov, C. Deibel
    Adv. Ener. Mater. 2, 1483 (2012) [link]

  4. Shockley Equation Parameters of Organic Solar Cells derived by Transient Techniques
    A. Foertig, J. Rauh, V. Dyakonov, C. Deibel
    Phys. Rev. B 86, 115302 (2012) [arXiv:1207.3341] [link]

  5. Impact of nongeminate recombination on the performance of pristine and annealed P3HT:PCBM solar cells
    Markus Gluecker, Alexander Foertig, Vladimir Dyakonov, Carsten Deibel
    Phys. Status Solidi (RRL) 6, 337 (2012) [arXiv:1207.3787] [link]

  6. Investigation of electronic trap states in organic photovoltaic materials by current-based deep level transient spectroscopy
    S. Neugebauer, J. Rauh, C. Deibel, V. Dyakonov
    Appl. Phys. Lett. 100, 263304 (2012) [arXiv:1206.2808] [link]

  7. A new approach of probing the mobility and lifetime of photogenerated charge carriers in organic solar cells under real operating conditions.
    A. Baumann, J. Lorrmann, D. Rauh, C. Deibel, and V. Dyakonov
    Adv. Mater. 24, 4381 (2012) [link]

  8. Excitation Dynamics in Low Band Gap Donor-Acceptor Copolymers and Blends.
    B. Gieseking, B. Jäck, E. Preis, S. Jung, M. Forster, U. Scherf, C. Deibel, and V. Dyakonov
    Adv. Ener. Mater. 2, 1477 (2012), [arXiv:1206.4529] [link]

  9. Direct and charge transfer state mediated photogeneration in polymer-fullerene bulk heterojunction solar cells
    M. Mingebach, S. Walter, V. Dyakonov, C. Deibel
    Appl. Phys. Lett. 100, 193302 (2012) [arxiv:1204.4788] [link]
    Selected for the May 21, 2012 issue of Virtual Journal of Nanoscale Science & Technology

  10. Direct detection of photoinduced charge transfer complexes in polymer fullerene blends
    J. Behrends, A. Sperlich, A. Schnegg, T. Biskup, C. Teutloff, K. Lips, V. Dyakonov, and R. Bittl
    Phys. Rev. B 85, 125206 (2012) [arXiv:1107.5649] [link]

  11. Charge density dependent nongeminate recombination in organic bulk heterojunction solar cells
    D. Rauh, C. Deibel, V. Dyakonov
    Adv. Funct. Mater. 22, 3371 (2012) [arxiv:1203.6105] [link]

  12. Identification of different origins for s-shaped current voltage characteristics in planar heterojunction organic solar cells
    J. Wagner, M. Gruber, A. Wilke, Y. Tanaka, K. Topczak, A. Steindamm, U. Hörmann, A. Opitz, Y. Nakayama, H. Ishii, J. Pflaum, N. Koch, and Wolfgang Brütting
    J. Appl. Phys. 111, 054509 (2012) [link]

  13. An Isolable Radical Anion Based on the Borole Framework
    H. Braunschweig, V. Dyakonov, J. O. C. Jimenez-Halla, K. Kraft, I. Krummenacher, K. Radacki, A. Sperlich, J. Wahler
    Angew. Chem. 124, 3031 (2012); Angew. Chem. Int. Ed. 51, 2977 (2012). [link]

  14. Electrically driven photon antibunching from a single molecule at room temperature
    M. Nothaft, S. Höhla, F. Jelezko, N. Frühauf, J. Pflaum, J. Wrachtrup
    Nat. Commun. 3, 628 (2012) [link]

  15. Detailed study of N,N'-(diisopropylphenyl)-terrylene-3,4:11,12-bis(dicarboximide) as electron acceptor for solar cells application
    J. Gorenflot, A. Sperlich, A. Baumann, D. Rauh, A. Vasilev, C. Li, M. Baumgarten, C. Deibel, V. Dyakonov
    Synth. Metals 162, 2669 (2012) [arXiv:1110.0658] [link] 

  1. Optical Sensing of Current Dynamics in Organic Light-Emitting Devices at the Nanometer Scale
    M. Nothaft, S. Höhla, A. Nicolet, F. Jelezko, N. Frühauf, J. Pflaum, J. Wrachtrup
    ChemPhysChem 12, 2590 (2011) [link]

  2. Reversible and irreversible interactions of P3HT with oxygen studied by spin-sensitive methods
    A. Sperlich, H. Kraus, C. Deibel, H. Blok, J. Schmidt, V. Dyakonov
    J. Phys. Chem. B 115, 13513 (2011) [arXiv:1110.1316] [link]

  3. Binding energy of singlet excitons and charge transfer complexes in MDMO-PPV:PCBM solar cells
    J. Kern, S. Schwab, C. Deibel, V. Dyakonov
    Phys. Status Solidi 5, 364 (RRL) (2011) [arXiv:1110.2671] [link]

  4. Built-in potential and validity of Mott-Schottky analysis in organic bulk heterojunction solar cells
    M. Mingebach, C. Deibel, V. Dyakonov
    Phys. Rev. B 84, 153201 (2011) [arXiv:1109.5528] [link]

  5. Observation of bi-polarons in blends of conjugated copolymers and fullerene derivatives
    T. J.Savenije, A. Sperlich, H. Kraus, M. Heeney, V. Dyakonov
    Phys. Chem. Chem. Phys. 13, 16579 (2011) [link]

  6. Printed paper photovoltaic cells
    A. Hübler, B. Trnovec, T. Zillger, M. Ali, N. Wetzold, M. Mingebach, A. Wagenpfahl, C. Deibel, V. Dyakonov
    Adv. Ener. Mater. 1, 1018 (2011) [link]

  7. Novel bis-C60 derivative compared to other fullerene bis-adducts in high efficiency polymer photovoltaic cells
    E. Voroshazi, K. Vasseur, T. Aernouts, P. Heremans, A. Baumann, C. Deibel, X. Xue, A. J. Herring, A. J. Athans, T. A. Lada, H. Richter, B. P. Rand
    J. Mater. Chem. 21, 17345 (2011) [link]

  8. Absence of Postnanosecond Charge Carrier Relaxation in Poly(3-hexylthiophene)/Fullerene Blends
    T. J. Savenije, D. H. K. Murthy, M. Gunz, J. Gorenflot, L. D. A. Siebbeles, V. Dyakonov, C. Deibel
    J. Phys. Chem. Lett. 2, 1368 (2011) [link]

  9. Triplet exciton generation in bulk-heterojunction solar cells based on endohedral fullerenes.
    M. Liedtke, A. Sperlich, H. Kraus, A. Baumann, C. Deibel, M. Wirix, J. Loos, C. Cardona, and V. Dyakonov
    J. Am. Chem. Soc. 133, 9088 (2011) [link] [arXiv:1107.3525]

  10. Electronic trap states in methanofullerenes.
    J. Schafferhans, C. Deibel, and V. Dyakonov
    Adv. Ener. Mater. 1, 655 (2011) [link] [arXiv:1107.3381]

  11. Relation of open circuit voltage to charge carrier density in organic bulk heterojunction solar cells.
    D. Rauh, A. Wagenpfahl, C. Deibel, V. Dyakonov
    Appl. Phys. Lett. 98, 133301 (2011) [link]

  12. First-principles calculations of anisotropic charge-carrier mobilities in organic semiconductor crystals.
    V. Stehr, J. Pfister, R. F. Fink, B. Engels, C. Deibel
    Phys. Rev. B 82, 155208 (2011) [link] [arXiv:1102.4289]

  13. Photoinduced C70 radical anions in polymer:fullerene blends.
    A. Sperlich, M. Liedtke, J. Kern, H. Kraus, C. Deibel, S. Filippone, J. L. Delgado, N. Martin, V. Dyakonov
    Phys. Status Solidi (RRL) 5, 128 (2011) [link] [arXiv:1102.1899]

  14. Influence of phase segregation on the recombination dynamics in organic bulk heterojunction solar cells.
    A. Baumann, T. J. Savenije, D. H. K. Murthy, M. Heeney, V. Dyakonov, C. Deibel
    Adv. Funct. Mater. 21, 1687 (2011) [link] [arXiv:1107.1576] 

  1. Role of polaron pair diffusion and surface losses in organic semiconductor devices
    T. Strobel, C. Deibel, V. Dyakonov
    Phys. Rev. Lett. 105, 266602 (2010) [link] [arXiv:1011.6260]

  2. Synthesis and Electron Transfer Characteristics of a Neutral, Low-Band-Gap, Mixed-Valence Polyradical
    D. Reitzenstein, T. Quast, F. Kanal, M. Kullmann, S. Ruetzel, M. S. Hammer, C. Deibel, V. Dyakonov, T. Brixner, C. Lambert
    Chem. Mater. 22, 6641 (2010) [link]

  3. Single-Molecule Spectroscopy and AFM Morphology Studies of a Diblock Copolymer Consisting of Poly(3-hexylthiophene) and Fullerene
    Z. Hu, J. Zou, C. Deibel, A. J. Gesquiere, L. Zhai
    Macromol. Chem. Phys. 211, 2416 (2010) [link]

  4. Fluorescence of laser-created electron-hole plasma in graphene
    R. J. Stöhr, R. Kolesov, J. Pflaum, J. Wrachtrup
    Phys. Rev. B 82, 121408(R) (2010) [link]

  5. Recombination processes in systems based on doped ionic crystals with impurity-related nanostructures
    D. O. Tolmachev, A. G. Badalyan, R. A. Babunts, V. A. Khramtsov, N.G. Romanov, P. G. Baranov, V. Dyakonov
    J. Phys.: Condens. Matter 22, 295306 (2010) [link]

  6. Oxygen doping of P3HT:PCBM blends:
    Influence on trap states, charge carrier mobility and solar cell performance
    J. Schafferhans, A. Baumann, A. Wagenpfahl, C. Deibel, V. Dyakonov
    Org. Electron. 11, 1693 (2010) [link] [arXiv:1008.4230]

  7. Comment on "Interface state recombination in organic solar cells"
    C. Deibel, A. Wagenpfahl
    Phys. Rev. B (2010) [link] [arXiv:1006.4813]

  8. S-shaped current-voltage characteristics of organic solar devices
    A. Wagenpfahl, D. Rauh, M. Binder, C. Deibel, V. Dyakonov
    Phys. Rev. B 82, 115306 (2010) [link] [arXiv:1005.5669]

  9. Charge Carrier Extraction by Linearly Increasing Voltage: Analytic framework and ambipolar transients
    J. Lorrmann, B. H. Badada, O. Inganäs, V. Dyakonov, C. Deibel
    J. Appl. Phys. 108, 113705 (2010) [link] [arXiv:1006.4394]

  10. Effect of doping of zinc oxide on the hole mobility of poly(3-hexylthiophene) in hybrid transistors
    M. Hammer, C. Deibel, J. Pflaum, V. Dyakonov
    Org. Electron. 11, 1569 (2010). [link] [arXiv:1006.4971]

  11. Enhanced photoluminescence from self-organized rubrene single crystal surface structures
    R. J. Stoehr, G. J. Beirne, P. Michler, R. Scholz, J. Wrachtrup, Jens Pflaum
    Appl. Phys. Lett. 96, 231902 (2010) [link]

  12. Spin Signatures of Photogenerated Radical Anions in Polymer-[70]Fullerene Bulk-Heterojunctions: High-Frequency Pulsed EPR Spectroscopy
    O. Poluektov, S. Filippone, N. Martin, A. Sperlich, C. Deibel, V. Dyakonov
    J. Phys. Chem. B 114, 14426 (2010) [arXiv:1110.1577] [link]

  13. Polymer-Fullerene Bulk Heterojunction Solar Cells (Review Paper)
    C. Deibel, V. Dyakonov
    Rep. Prog. Phys. 73, 096401 (2010) [link] [arXiv:1003.0359]

  14. Role of the charge transfer state in organic donor-acceptor solar cells (Review Paper)
    C. Deibel, T. Strobel, V. Dyakonov
    Adv. Mater. 22, 4097 (2010) [link]

  15. Organic Bulk Heterojunction Solar Cells (Review Paper)
    C. Deibel, V. Dyakonov, C. J. Brabec
    IEEE J. Sel. Top. Quantum Electron. 16,1517 (2010) [link]

  16. Polymeric Squaraine Dyes as Electron Donors in Bulk Heterojunction Solar Cells
    S. F. Völker, S. Uemura, M. Limpinsel, M. Mingebach, C. Deibel, V. Dyakonov, C. Lambert
    Macromol. Chem. Phys. 211, 1098 (2010) [link] [arXiv:1002.3568]

  17. Organic Solar Cell Efficiencies under the Aspect of Reduced Surface Recombination Velocities
    Alexander Wagenpfahl, Carsten Deibel, Vladimir Dyakonov
    IEEE J. Sel. Top. Quantum Electron. 16, 1759 (2010) [link] [arXiv:1001.4963]

  18. Photocurrent in bulk heterojunction solar cells
    Moritz Limpinsel, Alexander Wagenpfahl, Markus Mingebach, Carsten Deibel, Vladimir Dyakonov  Phys. Rev. B 81, 085203 (2010) [arxiv:1001.2546] [link]

  19. Energetics of excited states in the conjugated polymer poly(3-hexylthiophene)
    Carsten Deibel, Daniel Mack, Julien Gorenflot, Achim Schöll, Stefan Krause, Friedrich Reinert, Daniel Rauh, Vladimir Dyakonov
    Phys. Rev. B 81, 085202 (2010) [arxiv:1001.2330] [link]

  20. Tunable Two-Dimensional Binary Molecular Networks
    Y.L. Huang, W. Chen, H. Li, J. Ma, J. Pflaum, A. T. S. Wee
    Small 6 (2010) 70

  21. Quality control of polymer solar modules by lock-in thermography
    Harald Hoppe, Jonas Bachmann, Burhan Muhsin, Karl-Heinz Drue, Ingo Riedel, Gerhard Gobsch, Claudia Buerhop-Lutz, Christoph J. Brabec, and Vladimir Dyakonov
    J. Appl. Phys. 107, 014505 (2010) [link]

  22. Organic solar cells characterized by dark lock-in thermography
    J. Bachmann, C. Buerhop-Lutz, C. Deibel, I. Riedel, H. Hoppe, C. J. Brabec, V. Dyakonov
    Sol. Energy Mater. Sol. Cells 94, 642 (2010) [link] 

  1. Improvement of the poly-3-hexylthiophene transistor performance using small molecule contact functionalization
    Rebecca Winter, Maria S. Hammer, Carsten Deibel and Jens Pflaum
    Appl. Phys. Lett. 95, 263313 (2009). [arXiv:0912.1336] [link]

  2. Fullerene Dimers (C60/C70) for Energy Harvesting.
    J. L. Delgado, E. Espildora, M. Liedtke, A. Sperlich, D. Rauh, A. Baumann, C. Deibel, V. Dyakonov, N. Martin
    Chem. Eur. J. 15, 13474 (2009), [link]

  3. Identification of Recombination Centers in Wide Band Gap Crystals and Related Nanostructures from Spin Dependent Tunneling Afterglow.
    R. A. Babunts, N. G. Romanov, D. O. Tolmachev, A. G. Badalyan, V. A. Khramtsov, P. G. Baranov, D. Rauh, and V. Dyakonov
    Phys. Sol. State 51, 2437-2445 (2009).

  4. Spin-dependent recombination of defects in bulk ZnO crystals and ZnO nanocrystals as studied by optically detected magnetic resonance.
    N.G. Romanov, D.O. Tolmachev, A.G. Badalyan, R.A. Babunts, P.G. Baranov, V. Dyakonov
    Physica B 404, 4783-4786 (2009).

  5. A "Cyanine-Cyanine" salt exhibiting photovoltaic properties.
    P. Bouit, D. Rauh, S. Neugebauer, J. Delgado, E. Di Piazza, S. Rigaut, O. Maury, C. Andraud, V. Dyakonov, N. Martin
    Org. Lett. (2009), [link]

  6. Origin of Reduced Polaron Recombination in Organic Semiconductor Devices.
    C. Deibel, A. Wagenpfahl, V. Dyakonov
    Phys. Rev. B. 80, 075203 (2009) [arXiv:0907.2428] [link]

  7. Charge Carrier Dissociation and Recombination in Polymer Solar Cells.
    C. Deibel
    Phys. Status Solidi A 206, 2731 (2009). [arXiv:0907.2294] [link]
    Selected as Editor's Choice, and on the front cover.

  8. Polaron Recombination in Pristine and Annealed Bulk Heterojunction Solar Cells.
    C. Deibel, A. Baumann, A. Wagenpfahl, V. Dyakonov
    Synth. Meth. 159, 2345 (2009) [arXiv:0907.2559] [link]

  9. Charge Carrier Concentration and Temperature Dependent Recombination in Polymer-Fullerene Solar Cells.
    A. Foertig, A. Baumann, D. Rauh, V. Dyakonov, C. Deibel
    Appl. Phys. Lett. 95, 052104 (2009) [arXiv:0907.1401] [link]
    Selected for the August 17, 2009 issue of Virtual Journal of Nanoscale Science &Technology.

  10. Origin of the Efficient Polaron Pair Dissociation in Polymer-Fullerene Blends.
    C. Deibel, T. Strobel, V. Dyakonov
    Phys. Rev. Lett. 103, 036402 (2009) [arXiv:0906.2486] [link]

  11. Nanoscale phase separation of a binary molecular system of copper phthalocyanine and di-indenoperylene on Ag(111),
    H. Huang, Y. Huang, J. Pflaum, A.T.S. Wee, W. Chen,
    Appl. Phys. Lett. 95 (2009) 263309 [link]

  12. Mixed crystalline films of co-evaporated hydrogen- and fluorine-terminated phthalocyanines and their application in photovoltaic devices,
    A. Opitz, B. Ecker, J. Wagner, A. Hinderhofer, F. Schreiber, J. Manara, J. Pflaum, W. Brütting,
    Organic Electronics 10 (2009) 1259

  13. Ultrathin Films of Diindenoperylene on Graphite and SiO_2,
    Y.L. Huang, W. Chen, H. Huang, D.C. Qi, S. Chen, X.Y. Gao, J. Pflaum, A.T.S. Wee,
    J. Phys. Chem. C 113 (2009) 9251 

  1. Bipolar Charge Transport in Poly(3-hexylthiophene)/Methanofullerene Blends: A Ratio Dependent Study.
    A. Baumann, J. Lorrmann, C. Deibel, V. Dyakonov
    Appl. Phys. Lett. 93, 252104 (2008), [arXiv:0810.5460] [link]
    Selected for the January 12, 2009 issue of Virtual Journal of Nanoscale Science & Technology

  2. Polaron Recombination in Pristine and Annealed Bulk Heterojunction Solar Cells.
    C. Deibel, A. Baumann, V. Dyakonov
    Appl. Phys. Lett. 93, 163303 (2008) [arXiv:0810.0542] [link]
    Selected for the November 3, 2008 issue of Virtual Journal of Nanoscale Science & Technology, covering a focused area of frontier research.

  3. Effect of doping- and field-induced Charge Carrier Density on the Electron Transport in nanocrystalline ZnO.
    M. Hammer, D. Rauh, V. Lorrmann, C. Deibel, V. Dyakonov
    Nanotechnology 19 (2008) 485701. [arXiv:0811.1924] [link]

  4. Trap distribution and the impact of oxygen-induced traps on the charge transport in poly(3-hexylthiophene).
    J. Schafferhans, A. Baumann, C. Deibel, V. Dyakonov
    Appl. Phys. Lett. 93, 093303 (2008). [arXiv:0810.3534] [link]

  5. Influence of Charge Carrier Mobility on the Performance of Organic Solar Cells.
    C. Deibel, A. Wagenpfahl, V. Dyakonov
    Phys. Status Solidi (RRL) 2, No. 4, 175-177 (2008).
    We were selected to be on the front cover. [arXiv:0806.2249] [link]

  6. Analytical Model for the Open-Circuit Voltage and its Associated Resistance of Organic Planar Heterojunction Solar Cells.
    D. Cheyns, P. Heremans, C. Deibel, S. Verlaak, B. P. Rand, J. Genoe, J. Poortmans.
    Phys. Rev. B 77, 165332 (2008) [link]
    selected as "Editors' Suggestion".

  7. Identification of shallow Al donors in Al-doped ZnO nanocrystals: EPR and ENDOR spectroscopy.
    S. B. Orlinskii, J. Schmidt, P. G. Baranov, V. Lorrmann, I. Riedel, D. Rauh, Vladimir Dyakonov
    Phys. Rev. B 77, 115334 (2008). [link]

  8. Tetracene film morphology: Comparative atomic force microscopy, X-ray diffraction and ellipsometry investigations, B. Gompf, D. Faltermeier, C. Redling, M. Dressel, J. Pflaum, Eur. Phys. J. E 27 (2008) 421.

  9. Kramers-Kronig-consistent optical functions of anisotropic crystals: generalized spectroscopic ellipsometry on pentacene, M. Dressel, B. Gompf, D. Faltermeier, A.K. Tripathi, J. Pflaum, M. Schubert, Opt. Express 16 (2008) 19770. [link]

  10. Comparative study of the growth of sputtered aluminum oxide films on organic and inorganic substrates, S. Sellner, A. Gerlach, S. Kowarik, F. Schreiber, H. Dosch, S. Meyer, J. Pflaum, G. Ulbricht, Thin Solid Films 516 (2008) 6377.

  11. Thermally and seed-layer induced crystallization in rubrene thin films, M. Nothaft, J. Pflaum, phys. stat. sol. B 245 (2008) 788.

  12. Growth morphologies and charge carrier mobilities of pentacene organic field effect transistors with rf sputtered aluminium oxide gate insulators on ITO glass, M. Voigt, J. Pflaum, M. Sokolowski, phys. stat. sol. b 205 (2008) 499.

  13. Exciton Diffusion Length in the Organic Semiconductor Diindenoperylene (DIP), D. Kurrle, J. Pflaum, Appl. Phys. Lett. 92 (2008) 133306. 

  1. Enantiotropic Polymorphism in Di-indenoperylene, M.A. Heinrich, J. Pflaum, A.K. Tripathi, W. Frey, M.L. Steigerwald, T. Siegrist, J. Phys. Chem. C 111 (2007) 18878.

  2. Growth and Electronic Transport in 9,10-diphenylanthracene Single Crystals – a High Mobility Ambipolar Organic Semiconductor, A.K. Tripathi, M. Heinrich, T. Siegrist, J. Pflaum, Adv. Mater. 19 (2007) 2097.

  3. Nanometer-thick Au-films as antireflection coating for infrared light, B. Gompf, J. Beister, T. Brandt, J. Pflaum, M. Dressel, Opt. Lett. 32 (2007) 1578.

  4. Ultra-low-power organic complementary circuits, H. Klauk, U. Zschieschang, J. Pflaum, M. Halik, Nature 445 (2007) 745.

  1. Charge Transport Properties of a Metal-free Phthalocyanine Discotic Liquid Crystal. C. Deibel, D. Janssen, P. Heremans, V. de Cupere, Y. Geerts, M. L. Benkhedir, G. J. Adriaenssens, Org. Electron. 7, 495 (2006). [arXiv:cond-mat/0607392] [link]

  2. Investigations of the Effects of Tempering and Composition Dependence on Charge Carrier Field Effect Mobilities in Polymer and Fullerene Films and Blends. E. von Hauff, J. Parisi, V. Dyakonov, J. Appl. Phys. 100, 043702 (2006). [link]

  3. P3HT/PCBM Bulk Heterojunction Solar Cells: Relation between Morphology and Electro-Optical Characteristics. P. Vanlaeke, A. Swinnen, I. Haeldermans, G. Vanhoyland, T. Aernouts, D. Cheyns, C. Deibel, J. D'Haen, P. Heremans, J. Poortmans, J. V. Manca, Sol. Energ. Mater. Sol. Cells 90, 2150 (2006). [link]

  4. Polythiophene Based Bulk Heterojunction Solar Cells: Morphology and its Implications, P. Vanlaeke, G. Vanhoyland, T. Aernouts, D. Cheyns, C. Deibel, J. Manca, P. Heremans and J. Poortmans, Thin Solid Films, 511-512, 358 (2006). [link]

  5. Current Limiting Mechanisms in MDMO-PPV Diodes, B. Bohnenbuck, E. von Hauff, J. Parisi, C. Deibel, V. Dyakonov, J. Appl. Phys. 99, 024506 (2006). [link]

  6. Infrared spectroscopy on the charge accumulation layer in rubrene single crystals, M. Fischer, M. Dressel, B. Gompf, A.K. Tripathi, J. Pflaum, Appl. Phys. Lett. 89 (2006) 182103.

  7. Molecular orientation dependent energy levels at interfaces with pentacene and pentacenequinone, N. Koch, I. Salzmann, R.L. Johnson, J. Pflaum, R. Friedlein, J.P. Rabe, Organic Electronics 7 (2006) 537.

  8. Optical properties of pentacene thin films and single crystals, D. Faltermeier, B. Gompf, M. Dressel, A.K. Tripathi, J. Pflaum, Phys. Rev. B 74 (2006) 125416.

  9. Correlation between ambipolar transport and structural phase transition in diindenoperylene single crystals, A.K. Tripathi, J. Pflaum, Appl. Phys. Lett. 89 (2006) 082103.

  10. Chemical and structural effects on the electronic transport in organic single crystals, J. Pflaum, J. Niemax, A.K. Tripathi, Chem. Phys 325 (2006) 152 (invited paper).

  11. Anomalous roughness evolution of rubrene thin films observed in real time during growth, S. Kowarik, A. Gerlach, S. Sellner, F. Schreiber, J. Pflaum, L. Cavalcanti, O. Konovalov, Phys. Chem. Chem. Phys. 8 (2006) 1834.

  12. Mechanisms for the enhancement of the thermal stability of organic thin films by aluminum oxide capping layers, S. Sellner, A. Gerlach, F. Schreiber, M. Kelsch, N. Kasper, H. Dosch, S. Meyer, J. Pflaum, M. Fischer, B. Gompf, G. Ulbricht, J. Mater. Res. 21 (2) (2006) 455.

  13. Bulk crystals of tetracene grown by vapor-Bridgman technique, J. Niemax, J. Pflaum, Appl. Phys. Lett. 87 (2006) 241921. 

  1. Diphenylmethanofullerenes: New and Efficient Acceptors in Bulk-Heterojunction Solar, I. Riedel, E. von Hauff, J. Parisi, N. Martin, F. Giacalone, V. Dyakonov, Adv. Funct. Mater. 15, 1979 (2005). [pdf]

  2. 50 MHz Rectifier Based on an Organic Diode, S. Steudel, K. Myny, V. Arkhipov, C. Deibel, S. De Vusser, J. Genoe, P. Heremans, Nature Materials 4, 597-600 (2005). [link]. Received one of the 2006 Scientific American Top 50 Awards for pioneering research (Scientific American, December 2006)

  3. Controlled enhancement of the electron field-effect mobility of F16CuPc thin film transistors by use of functionalized SiO2 substrates, D.G. de Oteyza, E. Barrena, J.O. Osso, H. Dosch, S. Meyer, J. Pflaum, Appl. Phys. Lett. 87 (2005) 183504.

  4. The effect of oxygen exposure on pentacene electronic structure, A. Vollmer, O.D. Jurchescu, I. Arfaoui, I. Salzmann, T.T.M. Palstra, P. Rudolf, J. Niemax, J. Pflaum, J.P. Rabe, N. Koch, Eur. Phys. J. E 17 (2005) 339.

  5. Comparison of the electronic properties of sublimation- and vapor-Bridgman-grown crystals of tetracene, J. Niemax, A.K. Tripathi, J. Pflaum, Appl. Phys. Lett. 86 (2005) 122105.

  6. Radiotracer measurements as a sensitive tool for the detection of metal penetration in molecular-based organic electronics, M. Scharnberg, J. Hu, J. Kanzow, K. Rätzke, R. Adelung, F. Faupel, C. Pannemann, U. Hilleringmann, S. Meyer, J. Pflaum, Appl. Phys. Lett. 86 (2005) 024104.

  7. LEED, STM, and TDS Studies of Ordered Thin Films of the Rhombus-Shaped Polycondensed Aromatic Hydrocarbon C54H22, on MoS2, GeS, and Graphite, C. Günther, N. Karl, J. Pflaum, R. Strohmaier, B. Gompf, W. Eisenmenger, M. Müller, K. Müllen, Langmuir 21 (2005) 656. 

  1. Influence of Nanomorphology on the Photovoltaic Action of Polymer-Fullerene Composites, D. Chirvase, J. Parisi, J. C. Hummelen, and V. Dyakonov, Nanotechnology, 15, 1317 (2004).

  2. Trap Limited hole mobility in semiconducting poly(3-hexylthiophene), Z. Chiguvare and V. Dyakonov, Phys. Rev. B 70, 235207 (2004).

  3. Organic p-i-n Solar Cells, B. Maennig, J. Drechsel, D. Gebeyehu, P. Simon, F. Kozlowski, A. Werner, F. Li, S. Grundmann, S. Sontag, M. Koch, K. Leo, M. Pfeiffer, H. Hoppe, D. Meissner, S. Sariciftci, I. Riedel, V. Dyakonov, J. Parisi, Appl. Phys. A 79, 1 (2004). [pdf]

  4. Effect of Temperature and Illumination on the Electrical Characteristics of Polymer-Fullerene Bulk Heterojunction Solar Cells, I. Riedel, V. Dyakonov, J. Parisi, L. Lutsen, D. Vanderzande, J. C. Hummelen, Adv. Funct. Mat. 14, 38 (2004). [pdf]

  5. Electrical Aspects of Operation of Polymer-Fullerene Solar Cells, V. Dyakonov, Thin Solid Films, 451, 493 (2004).

  6. Influence of electronic transport properties of polymer-fullerene blends on the performance of bulk heterojunction photovoltaic devices, I. Riedel, V. Dyakonov. phys. stat. sol. (a), 201, 1332 (2004). [pdf]

  7. Spectroscopy of Electronic Defect States in Cu(In,Ga)(S,Se)2 Heterojunctions, C. Deibel, V. Dyakonov, J. Parisi, Europhys. Lett. 66, 399 (2004). [arXiv:0712.2982] [link]

  8. Mechanisms Controlling the Efficiency of Polymer Solar Cells, V. Dyakonov, Appl. Phys. A, 79, 21 (2004).

  9. Photoinduced Charge Transfer in Composites of Conjugated Polymers and Semiconductor Nanocrystals, M. Pientka, V. Dyakonov, D. Meissner, A. Rogach, D. Talapin, H. Weller, L. Lutsen, D. Vanderzande. Nanotechnology 15, 163 (2004). (Feature Article)