biostudies-literatureXiao LNatural Science Foundation of Zhejiang ProvinceJiangxi Province Major Science and Technology Research and Development Special ProjectNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu Provincee2408684https://www.ebi.ac.uk/biostudies/studies/S-EPMC11672277biostudies-literatureUnknown11(48)High temperatures facilitate the formation of stable, high-crystallinity α-FAPbI₃ films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot-press-assisted recrystallization strategy is reported to grow stable phase-pure α-FAPbI₃ film without any dopants. High temperature can promote the transformation of δ-FAPbI₃ to α-FAPbI₃, and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α-FAPbI₃ film prepared by hot-press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp-heat stability, showing no significant change after Advanced science (Weinheim, Baden-Wurttemberg, Germany)High-Temperature Driven Recrystallization for Stable Dopant-Free α-FAPbI<sub>3</sub> Perovskite Solar Cells.PMC1167227752325309223091702197117220203ABC28W007LQ24E020003BK20231194Xiao LWang CLu ZChen YHe LXu XZhao JLi LZou GfalseHigh-Temperature Driven Recrystallization for Stable Dopant-Free α-FAPbI<sub>3</sub> Perovskite Solar Cells.High temperatures facilitate the formation of stable, high-crystallinity α-FAPbI₃ films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot-press-assisted recrystallization strategy is reported to grow stable phase-pure α-FAPbI₃ film without any dopants. High temperature can promote the transformation of δ-FAPbI₃ to α-FAPbI₃, and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α-FAPbI₃ film prepared by hot-press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp-heat stability, showing no significant change after 2024-01-01T00:00:00Z2024 Dec2025-04-04T02:23:07.645Z2025-04-04T02:23:07.645ZS-EPMC116722773952747110.1002/advs.202408684