Solution‐processed perovskite precursors, especially for MAPbBr₃‐assisted FAPbI₃ crystallization, has been noted to achieve high power conversion efficiency (PCE) for perovskite solar cells (PSCs). However, this low‐temperature processed (FAPbI₃)_x(MAPbBr₃)_1−x typical precursor derived from commercial products (FAI, PbI₂, MABr, and PbBr₂) suffers from environmental sensitivity, poor film crystallinity and less than ideal device reproducibility. Herein, (FAPbI₃)_x(MAPbBr₃)_1–x (0.80 ≤ x ≤ 0.90)‐based planar inverted PSCs are fabricated, employing grinded monocrystalline MAPbBr₃ and powdered polycrystalline FAPbI₃ as precursors. The champion device with optimal molar ratio x = 0.85 comprising highly crystalline larger‐grained perovskite film with enhanced carrier transport kinetics and reduced trap‐state density exhibits boosted efficiency reaching 20.50%, which shows a 22.90% improvement over typical precursors with a PCE of 16.68%. In addition, the crystal powder precursor yields obvious film stability under ambient conditions (23 °C, 65–85% humidity) for 150 days and improved device storage stability in the glove box within two months. This protocol using stock crystal powders for perovskite precursor formulation provides a relatively facile and reproducible device fabrication route for the commercialization of PSCs.

中文翻译：

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通过FAPbI3和MAPbBr3晶体粉末提高平面倒置（FAPbI3）x（MAPbBr3）1-x太阳能电池的效率和稳定性

固溶处理的钙钛矿前体，尤其是用于MAPbBr ₃辅助的FAPbI ₃结晶的钙钛矿前体，已实现了钙钛矿太阳能电池（PSC）的高功率转换效率（PCE）。但是，这种从商业产品（FAI ，PbI ₂，MABr和PbBr ₂）衍生的低温加工的（FAPbI ₃）_x（MAPbBr ₃）_{1- x}典型的前体具有环境敏感性，较差的薄膜结晶度和不理想的器件的缺点。重现性。在本文中，（FAPbI ₃）_X（MAPbBr ₃）_{1- X}（0.80≤  X ≤0.90）的平面倒置PSC是以磨碎的单晶MAPbBr ₃和粉状的多晶FAPbI ₃为前体制造的。最佳摩尔比x的冠军设备 = 0.85的高结晶大晶粒钙钛矿薄膜具有增强的载流子传输动力学和降低的陷阱态密度，可将效率提高到20.50％，比PCE为16.68％的典型前体提高22.90％。此外，晶体粉末前驱体在环境条件（23°C，65-85％湿度）下可持续150天产生明显的薄膜稳定性，并在两个月内提高了手套箱中设备的存储稳定性。该使用原晶体粉末用于钙钛矿前体配方的方案为PSC的商业化提供了相对简便且可重现的设备制造路线。