1. Chlorine-Incorporation-Induced Formation of the Layered Phase for Antimony-Based Lead-Free Perovskite Solar Cells.
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Fangyuan Jiang, Dongwen Yang, Youyu Jiang, Tiefeng Liu, Xingang Zhao, Yue Ming, Bangwu Luo, Fei Qin, Jiacheng Fan, Hongwei Han, Lijun Zhang, and Yinhua Zhou
- Subjects
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SOLAR cells , *ELECTRIC properties , *PEROVSKITE , *LEAD toxicology , *LEAD & the environment , *SOLAR energy conversion , *SOLAR absorber-convertors , *ANTIMONY compounds - Abstract
The environmental toxicity of Pb in organic-inorganic hybrid perovskite solar cells remains an issue, which has triggered intense research on seeking alternative Pb-free perovskites for solar applications. Halide perovskites based on group-VA cations of Bi3+ and Sb3+ with the same lone-pair ns² state as Pb2+ are promising candidates. Herein, through a joint experimental and theoretical study, we demonstrate that Cl-incorporated methylammonium Sb halide perovskites (CH3NH3)3Sb2ClXI9-X show promise as efficient solar absorbers for Pbfree perovskite solar cells. Inclusion of methylammonium chloride into the precursor solutions suppresses the formation of the undesired zerodimensional dimer phase and leads to the successful synthesis of high-quality perovskite films composed of the two-dimensional layered phase favored for photovoltaics. Solar cells based on the as-obtained (CH3NH3)3Sb2ClXI9-X films reach a record-high power conversion efficiency over 2%. This finding offers a new perspective for the development of nontoxic and low-cost Sbbased perovskite solar cells. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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