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- W4292639890 abstract "Abstract Yellow‐phase formamidinium lead iodide (δ‐FAPbI 3 ) as a degradation product of black perovskite phase is usually unwelcome in perovskite solar cells (PSCs). However, it also shows high potential in passivating defects and protecting perovskite films from moisture intrusion due to its water‐stable nature. Herein, the utilization of δ‐FAPbI 3 to construct a yellow/black heterophase bilayer is reported, in which the perovskite layer is shielded by in situ formed δ‐FAPbI 3 species on the surface, for PSCs with enhanced efficiency and stability. It is found that the δ‐FAPbI 3 layer with a broader bandgap than the black‐phase perovskite can efficiently suppress the charge recombination at the interface, offering a high PSC efficiency of 23.10%. More importantly, the δ‐FAPbI 3 ‐modified devices exhibit preferable stability against various external stresses to that of the control ones. Compared to those using the disliked δ‐FAPbI 3 in the literature, the strategy, which maximizes its merits in reducing the interfacial charge recombination and stabilizing the perovskite structure, is more simple yet effective to realize highly efficient and stable PSCs." @default.
- W4292639890 created "2022-08-22" @default.
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- W4292639890 date "2022-08-10" @default.
- W4292639890 modified "2023-10-03" @default.
- W4292639890 title "Maximizing Merits of Undesirable δ‐FAPbI<sub>3</sub> by Constructing yellow/black Heterophase Bilayer for Efficient and Stable Perovskite Photovoltaics" @default.
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- W4292639890 doi "https://doi.org/10.1002/adfm.202204642" @default.
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