In this report, we discuss the 22% efficiency improvement of solar cells based on the MAPbI3 perovskite film extracted with a mixed anti-solvent. The film quality of MAPbI3 extracted from the mixed anti-solvent of ether and isopropanol is improved greatly. The average grain size of the film may be enlarged twice. We argue that some solvents residing in the precursor may effectively promote the crystallization process of MAPbI3 to form large grains. We believe that this study may open a method to fabricate high-quality MAPbI3 perovskite films for highly efficient solar cells.

中文翻译：

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基于混合反溶剂提取的 MAPbI3 薄膜提高太阳能电池效率

在本报告中，我们讨论了基于用混合反溶剂提取的 MAPbI3 钙钛矿薄膜的太阳能电池效率提高 22%。从乙醚和异丙醇混合反溶剂中提取的MAPbI3的膜质量大大提高。薄膜的平均晶粒尺寸可以放大两倍。我们认为存在于前驱体中的一些溶剂可以有效地促进 MAPbI3 的结晶过程以形成大晶粒。我们相信，这项研究可能会开辟一种方法来制造用于高效太阳能电池的高质量 MAPbI3 钙钛矿薄膜。