甲脒
光伏
钙钛矿(结构)
材料科学
结晶
表面能
涂层
Crystal(编程语言)
相(物质)
晶体生长
钙钛矿太阳能电池
能量转换效率
纳米技术
化学工程
复合材料
光电子学
光伏系统
化学
结晶学
有机化学
计算机科学
程序设计语言
生物
工程类
生态学
作者
Wenhuai Feng,Xudong Liu,Gengling Liu,Guo Yang,Yuxuan Fang,Jinliang Shen,Bowen Jin,Xi Chen,Yuhua Huang,Xu‐Dong Wang,Congcong Wu,Shaopeng Yang,Wu‐Qiang Wu
标识
DOI:10.1002/anie.202403196
摘要
Photoactive formamidinium lead triiodide (α‐FAPbI3) perovskite has dominated the prevailing high‐performance perovskite solar cells (PSCs), normally for those spin‐coated, conventional n‐i‐p structured devices. Unfortunately, α‐FAPbI3 has not been made full use of its advantages in inverted p‐i‐n structured PSCs fabricated via blade‐coating techniques owing to uncontrollable crystallization kinetics and complicated phase evolution of FAPbI3 perovskites. Herein, a customized crystal surface energy regulation strategy has been innovatively developed by incorporating 0.5 mol% of N‐aminoethylpiperazine hydroiodide (NAPI) additive into α‐FAPbI3 crystal‐derived perovskite ink, which enabled the formation of phase‐pure, highly‐oriented α‐FAPbI3 films. We deciphered the phase transformation mechanisms and crystallization kinetics of blade‐coated α‐FAPbI3 perovskite films via combining a series of in‐situ characterizations. Interestingly, the strong chemical interactions between the NAPI and inorganic Pb‐I framework help to reduce the surface energy of (100) crystal plane by 42%, retard the crystallization rate and lower the formation energy of α‐FAPbI3. The resultant blade‐coated inverted PSCs based on (100)‐oriented α‐FAPbI3 perovskite films realized promising efficiencies up to 24.16% (~26.5% higher than that of the randomly‐oriented counterparts), accompanied by improved operational stability. This result represented one of the best performances reported to date for FAPbI3‐based inverted PSCs fabricated via scalable deposition methods.
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