Affiliation:
1. The Institute of Basic Science, Department of Physics, Kunsan National University, Gunsan 54150, Republic of Korea
Abstract
We have investigated the effects of the methylammonium bromide (MABr) content of the precursor solution on the properties of wide-bandgap methylammonium lead tribromide (MAPbBr3) perovskite solar cells (PSCs). In addition, the anti-solvent process for fabricating MAPbBr3 perovskite thin films was optimized. The MAPbBr3 precursor was prepared by dissolving MABr and lead bromide (PbBr2) in N,N-dimethylformamide and N,N-dimethyl sulfoxide. Chlorobenzene (CB) was used as the anti-solvent. We found that both the morphology of the MAPbBr3 layer and the PSCs performance are significantly affected by the MABr content in perovskite precursor solution and anti-solvent dripping time. The best-performing device was obtained when the molar ratio of MABr:PbBr2 was 1:1 and the CB drip time was 10 s. The best device exhibited a power conversion efficiency of 7.58%, short-circuit current density of 7.32 mA·cm−2, open-circuit voltage of 1.30 V, and fill factor of 79.87%.
Funder
Korea Electric Power Corporation
Korea Institute of Energy Technology Evaluation and Planning
Subject
General Materials Science,General Chemical Engineering
Cited by
2 articles.
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