SKM 2023 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.32: Poster

Monday, March 27, 2023, 18:00–20:00, P3

Steady-State Microwave Conductivity (SSMC) on ionic liquid doped lead halide perovskites — •Patrick Dörflinger¹, Yong Ding², Mohammad Khaja Nazeeruddin², and Vladimir Dyakonov¹ — ¹Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — ²Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, EPFL Valais, Sion 1950, Switzerland

Knowledge of the charge carrier lifetime and recombination behavior in perovskite solar cells is crucial, as non-radiative recombination processes still limit solar cell efficiencies. Here we present a technique to probe the charge carrier recombination. Of particular interest is the dominant charge carrier recombination pathway, which enables to quantify non-radiative recombination in the perovskite bulk. Furthermore, simultaneous photoluminescence measurements allow for estimating the doping density and determining the radiative efficiency at different charge carrier densities. As an example, the SSMC technique is applied to investigate the influence of ionic liquid additives, which are known to improve the stability of perovskite solar cells and the optoelectronic properties of perovskite absorbers.