Abstract Perovskite components have tremendous influence on the film quality and device performance. There are obvious impurity defects, holes, etc. in the films of conventional perovskite solar cells (PSCs). In this work, the perovskite component was tuned to [HC(NH2)2]0.3(CH3NH3)0.7PbI2.4Cl0.3Br0.3 (FA0.3MA0.7PbI2.4Cl0.3Br0.3) via cation and anion co-mixing, it was observed that the residual PbI2 at perovskite film had a good passivation effect on the grain boundaries and further ameliorated the quality of the film. The photoelectric conversion efficiency (PCE) of low-cost carbon electrode-based photovoltaic devices we prepared increased from 8.58% to 12.40%. Our work will also be more beneficial to the commercialization of PSCs and the preparation of other optoelectronic devices.

中文翻译：

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PbI2钝化对钙钛矿薄膜晶界与阳离子和阴离子共混对光伏器件性能的影响

摘要 钙钛矿成分对薄膜质量和器件性能有着巨大的影响。传统钙钛矿太阳能电池（PSCs）的薄膜存在明显的杂质缺陷、孔洞等。在这项工作中，钙钛矿组分通过阳离子和阴离子共混调节为 [HC(NH2)2]0.3(CH3NH3)0.7PbI2.4Cl0.3Br0.3 (FA0.3MA0.7PbI2.4Cl0.3Br0.3)，观察到钙钛矿薄膜中残留的PbI2对晶界具有良好的钝化作用，进一步改善了薄膜的质量。我们制备的低成本碳电极基光伏器件的光电转换效率（PCE）从 8.58% 提高到 12.40%。我们的工作也将更有利于 PSC 的商业化和其他光电器件的制备。