Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.231
Publication date: 7th February 2022
Despite a decade of research, much remains unknown about the role that grain boundaries play in impacting the photophysics of lead halide perovskites and influencing their performance in solar cells. In this talk, I will describe how by combining experimental studies with theoretical device simulations, we find that the recombination at grain boundaries is diffusion limited and depends on the grain area with small grains acting as recombination hot spots. We show that the distribution of grain sizes not only influences the overall performance of perovskite solar cells, but also leads to significant current exchange between small and large grains at open-circuit conditions.
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International Conference on Hybrid and Organic Photovoltaics
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