光伏
材料科学
钙钛矿(结构)
结晶度
能量转换效率
结晶
表面能
相(物质)
热稳定性
纳米技术
光电子学
光伏系统
化学工程
化学物理
化学
有机化学
复合材料
工程类
生态学
生物
作者
Hui Lü,Qian Wen,Ru Qin,Yunhui Han,Jiaqi Wang,Wenzhi Yang,Lei Wu,Longhui Liu,Bo Ma,Kui Zhao,Zhengguo Zhang,Bita Farhadi,Hongxiang Li,Kang Wang,Kai Wang,Shengzhong Liu
标识
DOI:10.1002/aenm.202405072
摘要
Abstract The complete phase transition from DMAPbI 3 and Cs 4 PbI 6 intermediates to the final CsPbI 3 perovskite phase is pivotal for fabricating high‐quality inorganic perovskite films. In this study, the reaction energy barrier between DMAPbI 3 and Cs 4 PbI 6 is sought to be reduced by increasing their surface energy, where a perfluorinated compound is designed using DFT modeling to saturate the surface of the intermediates to effectively prevent their crystalline growth. Consequently, the smaller intermediates with ultrahigh surface energy react more energetically to facilitate a rapid conversion to the desired perovskite phase. It is found that the resultant inorganic perovskite shows improved crystallinity and morphology, as demonstrated by suppressed non‐radiative recombination and prolonged carrier lifetimes. As a result, the optimized inorganic perovskite solar cells (PSCs) achieve a power conversion efficiency (PCE) of over 20%, along with significantly improved light and thermal stability. This work provides a way to regulate crystallization dynamics for advanced quality of inorganic perovskites.
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