3 years ago

First-Principles Screening of Lead-Free Methylammonium Metal Iodine Perovskites for Photovoltaic Application

First-Principles Screening of Lead-Free Methylammonium Metal Iodine Perovskites for Photovoltaic Application
Rui-Feng Lu, Ai-Long Li, Kun Zou, Ya-Juan Li, Lei Sun, Lei Jiang, Tao Wu, Wei-Qiao Deng
Although organo-halide lead perovskite solar cells have achieved outstanding photovoltaic performance in recent years, environmental concern about lead pollutant limits its large-scale commercialization. To address lead-free organo-halide perovskite materials, here we report first-principles screening of different perovskite materials MAXI3 with consideration of all possible (27 in total) divalent metal ions. Ten kinds of perovskite structures are obtained with a nonzero bandgap, and the others are metallic. Among them, five kinds of perovskite materials (MAXI3: X = Pb, Sn, Ge, Cd, Be) have appropriate bandgaps as the light-absorbing material in solar cells, in which MACdI3 and MABeI3 are reported for the first time. Various corresponding experiments have been carried out to confirm our theoretical predictions.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b04685

DOI: 10.1021/acs.jpcc.7b04685

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