期刊
NANOMATERIALS
卷 11, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano11092408
关键词
CsPbBr3; planar perovskite solar cells; InBr3; porous PbBr2 film
类别
资金
- Scientific Research Staring Foundation for the Doctors of the Northeast Electric Power University [BSJXM-2018223]
In this study, InBr3 was introduced into the PbBr2 precursor solution to successfully prepare planar carbon-based CsPbBr3 solar cells with high-quality perovskite film. The porous PbBr2 structure and increasing PbBr2 concentration were found to be beneficial for increasing the CsPbBr3 film thickness and light absorption capacity.
Due to the low solubility of CsBr in organic solvents, the CsPbBr3 film prepared by the multi-step method has holes and insufficient thickness, and the light absorption capacity and current density of the perovskite film hinder the further improvement in the power conversion efficiency (PCE) of CsPbBr3 solar cells. In this study, we introduced InBr3 into the PbBr2 precursor solution and adjusted the concentration of PbBr2, successfully prepared PbBr2 with a porous structure on the compact TiO2 (c-TiO2) substrate to ensure that it fully reacted with CsBr, and obtained the planar carbon-based CsPbBr3 solar cells with high-quality perovskite film. The results reveal that the porous PbBr2 structure and the increasing PbBr2 concentration are beneficial to increase the thickness of the CsPbBr3 films, optimize the surface morphology, and significantly enhance the light absorption capacity. Finally, the PCE of the CsPbBr3 solar cells obtained after conditions optimization was 5.76%.
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