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Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 13: Ultra-Fast Phenomena

HL 13.4: Talk

Tuesday, September 6, 2022, 10:15–10:30, H33

Multiparameter determination of time-resolved photoluminescence measurements — •Sebastian Bohm1, Max Großmann1, Stefan Heyder1, Klaus Schwarzburg2, Peter Kleinschmidt1, Erich Runge1, and Thomas Hannappel11Fakultät für Mathematik und Naturwissenschaften, Technische Universität Ilmenau, Ehrenbergstraße 29, 98693 Ilmenau — 2Institut Solare Brennstoffe, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin

Accurate knowledge of radiative, non-radiative, and trapping photoluminescence lifetimes is crucial for the understanding and improvement of semiconductor devices. In principle, these parameters can be obtained from time-resolved photoluminescence spectroscopy (TRPL) measured at different excitation level, see, e.g., M. W. Gerber and R. N. Kleiman, J. Appl. Phys. 122, 095705 (2017), DOI 10.1063/1.5001128. We show that a full multi-parameter estimation based on a suitable maximum likelihood estimator and state-of-the-art non-linear multi-parameter optimization yields superior results compared to conventional data analysis.

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