卤化物
卤素
钙钛矿(结构)
光伏
串联
带隙
卤键
相(物质)
光电子学
材料科学
光伏系统
化学物理
化学工程
纳米技术
化学
无机化学
结晶学
电气工程
有机化学
烷基
复合材料
工程类
作者
Xinliang Fu,Tingwei He,Shifu Zhang,Xiaojuan Lei,Yuanzhi Jiang,Di Wang,Pingchuan Sun,Dongbing Zhao,Hsien‐Yi Hsu,Xiaofang Li,Mei Wang,Mingjian Yuan
出处
期刊:Chem
[Elsevier]
日期:2021-11-01
卷期号:7 (11): 3131-3143
被引量:57
标识
DOI:10.1016/j.chempr.2021.08.009
摘要
Mixed-halide perovskite provides band-gap tunability, which is essential for tandem solar cell application. However, ion migration inducing phase segregation seriously affects the device’s long-term operational stability. The issue thus represents an important challenge for the whole perovskite community and urgently needs effective solutions. We showcase here for the first time that a strong chemical interaction, a halogen-halogen bond, is introduced at the phase interface to suppress the ion migration by increasing the corresponding activation energy. Various characterizations have proved that halogen-halogen bonds form between 2D and 3D phases, which do suppress the halide segregation. As expected, the encapsulated device retains 90% of initial power conversion efficiency (PCE) after maximum power point (MPP) tracking for ∼500 h under continuous simulated 1-sun illumination (AM 1.5) in ambient conditions, representing one of the most stable, wide-band-gap, mixed-halide perovskite photovoltaics reported so far.
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