Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells

Jan Seidel, Martin A. Green, Anita Ho‐Baillie, Jincheol Kim, Shujuan Huang, Jonathan Lau, Sang Il Seok, Nam Joong Jeon, Jae Sung Yun, Arman Mahboubi Soufiani
2016-05-27

SCID:  54.1/7dv9th6m
The critical role of grain boundaries for (CH(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite solar cells studied by Kelvin probe force microscopy under bias voltage and illumination is reported. Ion migration is enhanced at the grain boundaries. Under illumination, the light-induced potential causes ion migration leading to a rearranged ion distribution. Such a distribution favors photogenerated charge-carrier collection at the grain boundaries.
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2016-05-27
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Jan Seidel
Martin A. Green
Anita Ho‐Baillie
Jincheol Kim
Shujuan Huang
Jonathan Lau
Sang Il Seok
Nam Joong Jeon
Jae Sung Yun
Arman Mahboubi Soufiani
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