Efficient manipulation of crystallization and control over defects are crucial for optimizing the performance and durability of perovskite solar cells (PSCs). In this study, a novel organic multifunctional additive, 2-(furan-3-yl)ethanamine hydrochloride (FFEACl), is introduced which plays a pivotal role in regulating the crystallization process of FAPbI₃. Incorporating FFEACl into the perovskite precursor solution effectively suppresses the formation of undesirable non-perovskite phase impurities while promoting the oriented crystallization of the α-phase FAPbI₃. Moreover, the addition of FFEACl leads to a more uniform surface potential and reduced defect density in the resulting FAPbI₃ film. Consequently, the top-performing PSC exhibits an impressive power conversion efficiency (PCE) of 25.41%, along with enhanced operational stability. Notably, the fabricated PSCs maintain over 80% of their initial PCE even after 1000 h of continuous operation under one-sun illumination. The findings present a facile and effective strategy for fabricating perovskite photovoltaic devices with exceptional performance and long-term reliability.

中文翻译：

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用呋喃取代的乙基铵添加剂调节 FAPbI3 基钙钛矿的结晶以实现高效太阳能电池


有效控制结晶和控制缺陷对于优化钙钛矿太阳能电池（PSC）的性能和耐用性至关重要。本研究引入了一种新型有机多功能添加剂2-(呋喃-3-基)乙胺盐酸盐(FFEACl)，它在调节FAPbI ₃ 的结晶过程中发挥着关键作用。将FFEACl掺入钙钛矿前驱体溶液中，有效抑制了不需要的非钙钛矿相杂质的形成，同时促进了α相FAPbI ₃ 的定向结晶。此外，FFEACl的添加导致所得FAPbI ₃ 薄膜中的表面电势更加均匀并降低了缺陷密度。因此，性能一流的 PSC 表现出高达 25.41% 的令人印象深刻的功率转换效率 (PCE)，并增强了运行稳定性。值得注意的是，即使在单太阳光照下连续运行 1000 小时后，所制造的 PSC 仍能保持其初始 PCE 的 80% 以上。研究结果提出了一种简单有效的策略来制造具有卓越性能和长期可靠性的钙钛矿光伏器件。