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arXiv · 2411.02754

Dynamics of Photoinduced Charge Carriers in Metal-Halide Perovskites

A. Bojtor·D. Krisztian·F. Korsos·S. Kollarics·G. Parada·M. Kollar·E. Horvath·X. Mettan·B. G. Markus·L. Forro·F. Simon
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Abstract

The measurement and description of the charge-carrier lifetime (tauc) is crucial for the wide-ranging applications of lead-halide perovskites. We present time-resolved microwave-detected photoconductivity decay (TRMCD) measurements and a detailed analysis of the possible recombination mechanisms including trap-assisted, radiative, and Auger recombination. We prove that performing injection-dependent measurement is crucial in identifying the recombination mechanism. We present temperature and injection level dependent measurements in CsPbBr_3, which is an inorganic lead-halide perovskite. In this material, we observe the dominance of charge-carrier trapping, which results in ultra-long charge-carrier lifetimes. Although charge trapping can limit the effectiveness of materials in photovoltaic applications, it also offers significant advantages for various alternative uses, including delayed and persistent photodetection, charge-trap memory, afterglow light-emitting diodes, quantum information storage, and photocatalytic activity.

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A. Bojtor, D. Krisztian, F. Korsos, S. Kollarics, G. Parada, M. Kollar, E. Horvath, X. Mettan, B. G. Markus, L. Forro, F. Simon. 2024-11-05. Dynamics of Photoinduced Charge Carriers in Metal-Halide Perovskites. https://doi.org/10.3390/nano14211742

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