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4-Isopropyl-4'-methyldiphenyliodonium Tetrakis(pentafluorophenyl)borate can be used as a material for Perovskite solar cells (PeSCs).  After mixing p-type 4-isopropyl-4'-methyldiphenyliodonium tetrakis(pentafluorophenyl)borate into the interface layer, the series resistance (Rs) value of PeSCs can be reduced, and the power conversion efficiency (PCE) of single crystal PeSC can be significantly improved^[1].

[1] CHIEN-CHEN KUO; Fang C C; Ganesh D Sharma. p-doping the interfacial layers with tetrakis(pentafluorophenyl)borate improves the power conversion efficiencies in single-crystal perovskite solar cells[J]. Surfaces and Interfaces, 2022, 30: Article 101858. DOI:10.1016/j.surfin.2022.101858.