光驱动动态缺陷钝化,实现高效无机过氧化物太阳能电池

IF 18.5 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Functional Materials Pub Date : 2024-11-20 DOI:10.1002/adfm.202416118
Zhiteng Wang, Qiyong Chen, Huidong Xie, Xiaolong Feng, Yachao Du, Tianxiang Zhou, Rui Li, Junqi Zhang, Lu Zhang, Zhuo Xu, Lili Xi, Qingwen Tian, Shengzhong (Frank) Liu
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摘要

由于其软晶格特性,全无机卤化铯铅(CsPbI3-xBrx)包晶很容易受到外部环境应力的影响,如潮湿、极性溶剂、光照,从而导致结构缺陷(VI、Ii 等)和离子迁移。然而,现有技术大多侧重于短期和静态钝化,对太阳能电池运行过程中形成的缺陷影响微乎其微。在此,我们采用了一种可光异构化的分子--1,3,3-三甲基吲哚-8′-甲氧基苯并吡咯螺环(OMe-SP)--作为 CsPbI3-xBrx 表面的界面保护层,该分子具有光驱动的前异构(SP)和后异构(PMC)构型。这种策略不仅能有效抑制卤素离子的迁移,还能实现缺陷的可持续钝化,从而显著减少界面电荷重组并延缓包晶降解。因此,OMe-SP 改性的包晶体太阳能电池(PSCs)表现出卓越的稳定性,在最大功率点(MPP)跟踪和持续一太阳光照射条件下,老化 1032 小时后仍能保持 91% 的初始效率。同时,经 OMe-SP 修饰的电池还实现了 22.20% 的惊人功率转换效率,在全无机包晶太阳能电池中名列前茅。总之,这种稳健策略的实施提供了可持续的缺陷钝化和持续的离子迁移抑制,从而实现了高 PCE 和稳定的无机包晶。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Light-Driven Dynamic Defect-Passivation for Efficient Inorganic Perovskite Solar Cells
Due to its soft lattice characteristics, all-inorganic cesium lead halide (CsPbI3-xBrx) perovskite is vulnerable to external environmental stress such as moisture, polar solvent, illumination. resulting in structural defects (VI, Ii, etc.) and ion mobility. However, most of the prior arts focus on short-term and static passivation, which has a negligible effect on defects formed during solar cell operation. Herein, a photoisomerizable molecule, 1,3,3-trimethylindolino-8′-methoxybenzopyrylospiran (OMe-SP), exhibiting light-driven pre-isomeric (SP) and post-isomeric (PMC) configurations, is employed as an interfacial protective layer on top of CsPbI3-xBrx. The present strategy not only effectively suppresses migration of halogen ions, but also enables sustainable passivation of defects, thereby significantly reducing interfacial charge recombination and retarding perovskite degradation. Consequently, the OMe-SP-modified perovskite solar cells (PSCs) exhibit superior stability, maintaining 91% of their initial efficiency after aging 1032 h under maximum power point (MPP) tracking and continuous one sun illumination. Meanwhile, the OMe-SP-modified cell also achieves an impressive power conversion efficiency of 22.20%, which stands as the highest among all-inorganic perovskite solar cells. Overall, the implementation of this robust strategy provides sustainable defect passivation and continuous suppression of ion migration for achieving both high PCE and stable inorganic perovskite.
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来源期刊
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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