Research Methods

Instrumental methods available in our group

Anodization: We use several home-made anodization setups based on computer-controlled power supplies and powerful chillers. The largest sample size achievable is approximately 14 cm x 14 cm. In charge: Hong, Xin.
Atomic layer deposition (ALD): One home-made reactor equipped for work with H2S, one custom-made reactor by ModularFlow with a piezoelectric crystal microbalance, and two commercial reactors from Arradiance, one of them with microbalance. In charge: Stefanie and Sandra (‘Snoopy’), Dirk and Sebastian (‘Cinderella’), Adriana and Ignacio (‘Rapunzel’).
Sputter coating: DC/HF sputter coater from Torr for Au, Ag, Al, Ti, Ni, Co, ITO, SiO2, and more. In charge: Pascal.
Electrochemical potentiostats: We can perform all types of preparative and analytical electrochemical work including impedance spectroscopy with the following instruments: eight-channel Gamry Interface 1000, single-channel Gamry Reference 600, single-channel Ivium CompactStat.e, five-channel battery tester Wuhan LAND CT2001A. In charge: Sandra.
Light sources: 150-W solar simulator (Newport), modulated light source (Ivium Modulight), 1000-W Xe lamp with monochromator. In charge: Dirk.
Glovebox: Innovative Technologies InertLab. In charge: Ying.
Ovens: Muffle furnace and tube furnace up to 1100°C (Nabertherm). In charge: Hong and Xin.
Laser cutter: GCC Spirit SLS (for cutting masks and samples accurately). In charge: Pascal.
Spectroscopic ellipsometers: SENpro by Sentech and DRE EL X-02 P Spec from Dr. Riss Ellipsometerbau. In charge: Jule, Ying.
UV-vis spectrometer: OceanOptics spectrometer with liquid cell and integration sphere. In charge: Adriana and Pascal.
Scanning electron microscope: refurbished Jeol JSM 6400 with ion getter pump, LaB6 cathode, energy-dispersive X-ray spectroscopy and computer upgrade. In charge: Sebastian & Ying.
X-ray diffractometer and reflectometer: Bruker D8 Advance equipped with Lynxeye XE-T detector, capable of reflectometry and XRD in grazing incidence. In charge: Sebastian & Dirk.
Optical microscope: trinocular Motic BA310 with camera. In charge: Sandra, Stefanie.
Spin coater: Laurell WS-650Mz-23NPPB. in charge: Dirk.
Autoclave: Designer build by Parr Instruments (96 bar, 700°C). in charge: Hong, Ying.
Hall setup: Model K2500-3SLP by MMR Technologies, 80 K – 580 K, 5000 Gauss. In charge: Adriana and Ignacio.
Oxygen sensor: Hamilton Visiferm for dissolved and gaseous oxygen. In charge: Sandra & Stefanie.
Quantum efficiency setup: Characterization of solar cells over the UV and visible based on a 300-W Xe lamp, an LED bias light, a double monochromator, and with either DC power meter or lock-in amplifier detection (Newport). In charge: Dirk.
Solution ALD setups: One microfluidic setup (1 x 1 cm2), custom built by ZUMOlab and our workshop, and one slot-die setup (10 x 10 cm2), custom built by our engineering colleagues (Brabec group / ZAE Bayern).  In charge: Maïssa.
Other ‘group jobs’: Waste (Michael), Solvents (Xin)

Our experience with various brands and companies

Thumbs up: Arradiance (ALD reactors), Gamry (electrochemical potentiostats), REMx (refurbished SEM), Torr (sputter coater), Innovative (glovebox), OceanOptics (UV-vis spectrometer), GCC (laser cutter), ElektroAutomatik (power supplies), Nabertherm (ovens), Parr (high-pressure reactors), Vacuubrand (pumps), ModularFlow (ALD reactors), ZUMOlab (custom automation)

Thumbs down: Huber (chillers), Wallburg (laser cutter), MaterialsMates (electrochemical potentiostats)