钝化
乙胺
钙钛矿(结构)
材料科学
卤素
钙钛矿太阳能电池
酒
氢键
无机化学
能量转换效率
太阳能电池
化学工程
化学
光化学
纳米技术
图层(电子)
光电子学
有机化学
分子
烷基
工程类
作者
Kaiping Zhu,Shan Cong,Zheng Lu,Yanhui Lou,Liang He,Jianmin Li,Jianning Ding,Ningyi Yuang,Mark H. Rümmeli,Guifu Zou
标识
DOI:10.1016/j.jpowsour.2019.04.056
摘要
Defects easily form in organic-inorganic hybrid perovskite (CH3NH3PbX3) absorber layers acting as recombination centers which reduce the performance of solar cells. Therefore, defect passivation is an efficient method to improve the performance of solar cells. Herein, ethylamine alcohol chlorides is introduced into perovskite films to passivate defects. The hydroxyl group and ammonium group in ethylamine alcohol chlorides can interact with halogen in MAPbIxCl3-x to form hydrogen bonds suppressing ion migration. In addition, the crosslinking neighbouring perovskite grains through hydrogen bonds can also improve the perovskite grain size and film coverage. The data demonstrate that the obvious reduction of the defect concentration via defect passivation contributes to an enhancement of the open-circuit voltage from 0.87 V to 0.92 V and the device efficiency from 14.52% to 16.97%.
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