甲脒
材料科学
钙钛矿(结构)
碘化物
卤化物
钝化
结晶
相变
化学工程
胺气处理
光化学
无机化学
纳米技术
化学
有机化学
工程类
物理
量子力学
图层(电子)
作者
Wenjian Shen,Haoyu Cai,Yingjie Kong,Wei Dong,Cong Bai,Guijie Liang,Wangnan Li,Juan Zhao,Fuzhi Huang,Yi‐Bing Cheng,Jie Zhong
出处
期刊:Small
[Wiley]
日期:2023-04-28
卷期号:19 (36)
被引量:4
标识
DOI:10.1002/smll.202302194
摘要
The α-phase formamidinium lead tri-iodide (α-FAPbI3 ) has become the most promising photovoltaic absorber for perovskite solar cells (PSCs) due to its outstanding semiconductor properties and astonishing high efficiency. However, the incomplete crystallization and phase transition of α-FAPbI3 substantially undermine the performance and stability of PSCs. In this work, a series of the protic amine carboxylic acid ion liquids are introduced as the precursor additives to efficiently regulate the crystal growth and phase transition processes of α-FAPbI3 . The MA2 Pb3 I8 ·2DMSO phase is inhibited in annealing process, which remarkably optimizes the phase transition process of α-FAPbI3 . It is noted that the functional groups of carboxyl and ammonium passivate the undercoordinated lead ions, halide vacancies, and organic vacancies, eliminating the deleterious nonradiative recombination. Consequently, the small-area devices incorporated with 2% methylammonium butyrate (MAB) and 1.5% n-butylammonium formate (BAFa) in perovskite show champion efficiencies of 25.10% and 24.52%, respectively. Furthermore, the large-area modules (5 cm × 5 cm) achieve PCEs of 21.26% and 19.27% for MAB and BAFa additives, indicating the great potential for commercializing large-area PSCs.
科研通智能强力驱动
Strongly Powered by AbleSci AI