钙钛矿(结构)
材料科学
能量转换效率
结晶
钝化
粒度
晶界
开路电压
光伏系统
光电子学
带隙
化学工程
纳米技术
电压
复合材料
电气工程
微观结构
图层(电子)
工程类
作者
Bin-Jie 斌杰 Li 李,Jia-Wen 嘉文 Li 李,Gen-Jie 根杰 Yang 杨,Meng-Ge 梦鸽 Wu 吴,Jun-Sheng 军胜 Yu 于
标识
DOI:10.1088/1674-1056/ace1d8
摘要
In the past period of time, perovskite solar cells have gained tremendous developments in improving photovoltaic performance, but they still face severe challenges. Defects in perovskite layers, especially at grain boundaries, severely limit the stabilization and efficiency of solar cells. In this work, we adopt 3-carboxyphenylboronic acid (CPBA) for modifying defects in perovskite thin films. Through the interaction among the carboxyl group, boronic acid and lead ions in the perovskite film, the crystallization effect of the perovskite molecular is greatly optimized. Moreover, the film defects are spontaneously passivated and the band gap is reduced, increasing the open circuit voltage and fill factor. Therefore, power conversion efficiency has been increased from 17.25% to 20.20%. This discovery provides a potential strategy for passivating the trap states in perovskite and enhancing the properties of devices.
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