Research :: Experimental Setups

Samples and Device Preparation

  • three-chamber glove box system with integrated evaporator chamber (metals and organics)
  • crystal growth set-up

Micro-structuring

  • e-beam lithography (resolution up to ca. 50 nm, Raith), in cooperation with ZAE Bayern

Material- und structural analysis

  • profilometer (Veeco Dektak 1500) organics)
  • scanning probe microscope (AFM, SCM, EFM, c-AFM, KP, MFM, Veeco)
  • scanning electron microscope with EDX (Ultra 55+, Carl Zeiss), in cooperation with ZAE Bayern
  • X-Ray diffractometer and reflectometer (XRD, XRR GE), in cooperation with ZAE Bayern

Optical Spectroscopy

  • Lockin-based photophyics setup with various excitation sources (514nm, 532nm, 632nm, 980nm,1064nm) from 4-350K
    • (field-dependent) Photoluminesence (PL)
    • Photoinduced Absorption (PIA)
  • Transient Absorption (TA) and photoluminescence setup (ns, fs-laser system)
    • ns N2-pumped dye laser (400-700nm)
    • fs spectroscopy (see below)

Femtosecond amplifier laser system

  • femtosecond Ti:sapphire oscillator (Mai-Tai, Pulsdauer 100fs)
  • cw pump laser (SpectraPhysics)
  • 1 kHz regenerative amplifier (SpectraPhysics Spitfire)
  • two optical parametric amplifier (OPA, TOPAS)
  • grating monochomator with cooled CCD camera
  • streak camera (time resolution 2 ps, Hamamatsu)

Transient photoconductivity

  • home built transient charge transport setup with ps-excitation, variable frequency from 1 Hz to 1 kHz
    • photo-CELIV (charge extraction by linearly increasing voltage)
    • transient photoconductivity (time of flight, TOF)
    • transient photocurrent and photovoltage (TPV, TPC)

Defect Spectroscopy

  • thermally stimulated current (TSC), current resolution fA, T=15-350K
  • thermally stimulated luminescence (TSL)
  • deep-level transient spectroscopy (DLTS)

Magnetic resonance spectroscopy

  • electron spin resonance spectrometer, ESR (X-Band, T=4,2-350K)
  • light induced ESR
  • optically detected ESR (PLDMR, PIA-DMR)

Device Characterization

  • Current-Voltage (J-V) set-up, variable temperature (T=15-350K)
  • Quantum yield (IPCE) and J-V set up, optical and electrical bias, integrated in the glove box
  • 4-probe conductivity setup (Janis Microprobe station, equipped with Agilent 4155C parameter analyzer, T=4-380K
  • Impedance Analyzer
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Setups