Regulating the Crystallization of FAPbI3-Based Perovskite with a Furan Substituted Ethylammonium Additive for Achieving Highly Efficient Solar Cells,Advanced Functional Materials

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Regulating the Crystallization of FAPbI3-Based Perovskite with a Furan Substituted Ethylammonium Additive for Achieving Highly Efficient Solar Cells
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-06-03 , DOI: 10.1002/adfm.202404099
Chenxu Zhao ₁ , Qi Zhang ₁ , Yongao Lyu ₁ , Jing Liu ₁ , Fan Shen ₁ , Huijing Liu ₁ , Hao Kong ₁ , Huifang Han ₁ , Anurag Krishna _{2,

3} , Jia Xu ₁ , Hong Zhang ₄ , Jianxi Yao ₁

Affiliation

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：

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

高效处理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。本研究介绍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 FAPbI₃ 的结晶过程中起着关键作用。将 FFEACl 掺入钙钛矿前驱体溶液中可有效抑制不需要的非钙钛矿相杂质的形成，同时促进α相 FAPbI₃ 的定向结晶。此外，添加 FFEACl 可使所得 FAPbI₃ 薄膜的表面电位更加均匀，缺陷密度降低。因此，性能最佳的 PSC 表现出令人印象深刻的 25.41% 的功率转换效率（PCE），同时增强了运行稳定性。值得注意的是，即使在单太阳照射下连续运行 1000 小时后，制造的 PSC 仍保持其初始 PCE 的 80% 以上。这些发现为制造具有卓越性能和长期可靠性的钙钛矿光伏器件提供了一种简单有效的策略。

更新日期：2024-06-03

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