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Measurement setup for time-resolved photoluminescence (TRPL)
Thanks to the DFG funding program for 'Major Research Instrumentation' supplemented by the funding from the European Regional Development Fund (Engl for: Europäischen Fonds für regionale Entwicklung (EFRE) via the WIBank, our Workgroup has been able to operate a TRPL measurement Setup since the end of 2024. The setup uses time-resolved photoluminescence spectroscopy (TRPL) to provide a method for the non-destructive investigation of recombination dynamics.
This major research setup is the main measurement setup of the 2021 founded Semiconductor Spectroscopy workgroup and provides ample research perspectives which will lead to further third party funded research projects.
The measurement technique uses the optical excitation of semiconductor materials by a short-pulse laser source and also the recording of the time sequence of the resulting luminescence signal by a fast and sensitive detector. The use of a streak camera is of advantage because it provides a data set of spectrally or spatially resolved information in addition to the luminescence dynamics. This enables fast and comprehensive data acquisition for the development and comprehensive testing of kinetic models.
The experiments focus on organic and perovskite semiconductors and semiconductor heterostructures. We investigate correlations between structural and optical properties, transport mechanisms of excitons and free charges in single crystals, thin films and heterostructures, as well as charge and energy transfer processes at internal interfaces.
Contact: Prof. Marina Gerhard