期刊
NANOMATERIALS
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/nano11051253
关键词
CsPbBr3; perovskite solar cells; InBr3; PbBr2; incorporation
类别
资金
- National Natural Science Foundation of China [51272086]
- Scientific Research Staring Foundation for the Doctors of the Northeast Electric Power University [BSJXM-2018223]
The introduction of InBr3 in the preparation of CsPbBr3 films improved the morphology, charge extraction, and transport capabilities, leading to enhanced performance of CsPbBr3 PSCs. At an optimal InBr3 concentration of 0.21 M, the power conversion efficiency of the InBr3:CsPbBr3 perovskite solar cell reached 6.48%, significantly higher than that of the pristine device.
In the process of preparing CsPbBr3 films by two-step or multi-step methods, due to the low solubility of CsBr in organic solvents, the prepared perovskite films often have a large number of holes, which is definitely not conducive to the performance of CsPbBr3 perovskite solar cells (PSCs). In response to this problem, this article proposed a method of introducing InBr3 into the PbBr2 precursor to prepare a porous PbBr2 film to increase the reaction efficiency between CsBr and PbBr2 and achieve the purpose of In (III) incorporation, which not only optimized the morphology of the produced CsPbBr3 film but also enhanced the charge extraction and transport capabilities, which was ascribed to the reduction of the trap state density and impurity phases in the perovskite films, improving the performance of CsPbBr3 PSCs. At the optimal InBr3 concentration of 0.21 M, the InBr3:CsPbBr3 perovskite solar cell exhibited a power conversion efficiency of 6.48%, which was significantly higher than that of the pristine device.
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