Observation of Negative Photoconductivity in (CH3NH3)3Bi2(BrxCl1–x)9: Correlating Ion Migration, Stability, and Efficiency in Mixed Halide Perovskite Solar Cell
Paramesh Chandra,
Swapan Kumar Mandal
Abstract:Electric field and light induced ion migration resulting in poor stability is a key hindrance for the development of perovskite solar cells and devices. Methods to identify the pathways of ion migration and subsequently to develop strategies to suppress them are prerequisites to develop perovskite solar cells with improved stability and high efficiency. In this report, we probe ion migration through the observation of negative photocurrent (I) measured by temperature (100−283 K) dependent transient photocurren… Show more
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