Optoelectronic Characterization Lab
The OEC Lab is the ICP's measurement centre: here, hypotheses from modelling and material development are experimentally tested, confirmed or rejected. It specialises in the comprehensive analysis of optoelectronic materials and components. The aim is to understand physical mechanisms, validate models and precisely evaluate the performance of novel systems.
The OEC Lab is designed to quantitatively and systematically investigate optoelectronic materials under controlled conditions – from room temperature to low temperature, from static DC sweep to ultra-fast transient experiments. By combining variable illumination, precise optical excitation, bias control, and automated data acquisition, we can measure and correlate electrical and optical properties in situ. This allows us to directly observe transport mechanisms, recombination, state density, degradation, and activation processes in novel semiconductor systems.
Measurement systems and methods:
- Measurement station for solar cells, including solar simulator and external quantum efficiency (EQE/IPCE)
- Various cryostats for low-temperature measurements
- Supercontinuum laser as a broadband, tunable light source
- Paios system for automated time- and frequency-resolved measurements (including nanosecond pulsed light source)
- Biologic potentiostat for electrical and electrochemical measurements
- Photoluminescence (PL), electroluminescence (EL) and infrared (IR) imaging (Vitios)
- Angle-dependent EL/PL luminescence spectroscopy (Phelos)
- TRPL: time-resolved PL measurements (< 25 ps temporal resolution)
- PLQY (photoluminescence quantum yield)
- Absorption spectroscopy (band edge, tail states)
- Ellipsometer for determining optical constants
- FTIR spectrometer
- Lifetime measurement station
With this combination of flexibility, automation and simultaneous measurement of electrical and optical parameters, the OEC Lab provides quantitative foundations for crucial insights into materials physics, optimisation and evaluation of novel optoelectronic technologies.