Berlin 2024 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 13: Poster I

HL 13.12: Poster

Montag, 18. März 2024, 15:00–18:00, Poster E

In situ time-resolved photoluminescence measurement in the PEC environment — •Peter Kleinschmidt, Elias Hartung, Lucas Krätschmer, David Ostheimer, and Thomas Hannappel — TU Ilmenau, Institute of Physics, Fundamentals of Energy Materials, 98693 Ilmenau

Recombination properties of minority charge carriers are crucial for the optoelectronic performance of a many semiconductor devices. Time-resolved photoluminescence (TRPL) measurement, based on time-correlated single photon counting, provides direct access to the effective minority charge carrier lifetime. Typically, this is carried out separately from preparation and operation of devices. We have developed a flexible TRPL-setup with a remote measuring head which allows measurement in different environments. We demonstrate measurement of charge carrier lifetimes in a photo-electrochemical cell, providing access to device performance and degradation in this environment. The measurement can be performed in correlation with photo-electrochemical operation of the sample and enables observation of different influences on the optoelectronic device properties.

Keywords: Photoluminescence; Optoelectronics; Photoelectrochemistry; Solar energy conversion