定制烷基胺吡啶衍生物与高性能反相包晶石太阳能电池的稳定表面接触

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Materials Pub Date : 2024-11-16 DOI:10.1002/adma.202415100
Sanwan Liu, Zhenxing Sun, Xia Lei, Tianyin Miao, Qisen Zhou, Rui Chen, Jianan Wang, Fumeng Ren, Yongyan Pan, Yong Cai, Zhengtian Tan, Wenguang Liu, Xiaoxuan Liu, Jingbai Li, Yong Zhang, Baomin Xu, Zonghao Liu, Wei Chen
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引用次数: 0

摘要

富镨钕-三碘化铯铅(FA1-xCsxPbI3)包晶有望成为具有高效率和高稳定性的包晶太阳能电池(PSC)。然而,由缺陷和残余拉伸应变引起的过氧化物表面缺陷在很大程度上限制了相应器件的光伏性能。本文系统研究了烷基胺修饰的吡啶衍生物对 FA1-xCsxPbI3 包晶表面缺陷的钝化能力。在所研究的表面钝化剂中,具有合适尺寸的 3-(2-氨基乙基)吡啶 (3-PyEA) 通过与 Npyridine 的强配位,被证明在减少表面碘杂质和缺陷(VI 和 I2)方面最为有效。此外,3-PyEA 的尾部氨基(-NH2)还能与 FA+ 阳离子反应,降低包晶薄膜的表面粗糙度,反应产物还能钝化 FA 空位(VFA),进一步加强它们与包晶表面的结合作用。这些优点抑制了非辐射重组损耗,释放了包晶薄膜的残余拉伸应力,并在包晶/[6,6]-苯基-C61-丁酸甲酯界面形成了有利的能级排列。因此,产生的倒置 FA1-xCsxPbI3 PSCs 获得了令人印象深刻的 25.65% 的功率转换效率 (PCE)(认证效率 25.45%,认证稳态效率 25.06%),并且在 55 °C 的空气中单日运行 1800 小时后仍能保持 96.5% 的初始 PCE。
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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Stable Surface Contact with Tailored Alkylamine Pyridine Derivatives for High‐Performance Inverted Perovskite Solar Cells
Formamidinium‐cesium lead triiodide (FA1‐xCsxPbI3) perovskite holds great promise for perovskite solar cells (PSCs) with both high efficiency and stability. However, the defective perovskite surfaces induced by defects and residual tensile strain largely limit the photovoltaic performance of the corresponding devices. Here, the passivation capability of alkylamine‐modified pyridine derivatives for the surface defects of FA1‐xCsxPbI3 perovskite is systematically studied. Among the studied surface passivators, 3‐(2‐aminoethyl)pyridine (3‐PyEA) with the suitable size is demonstrated to be the most effective in reducing surface iodine impurities and defects (VI and I2) through its strong coordination with Npyridine. Additionally, the tail amino group (─NH2) from 3‐PyEA can react with FA+ cations to reduce the surface roughness of perovskite films, and the reaction products can also passivate FA vacancies (VFA), and further strengthen their binding interaction to perovskite surfaces. These merits lead to suppressed nonradiative recombination loss, the release of residual tensile stress for the perovskite films, and a favorable energy‐level alignment at the perovskite/[6,6]‐phenyl‐C61‐butyric acid methyl ester interface. Consequently, the resulting inverted FA1‐xCsxPbI3 PSCs obtain an impressive power conversion efficiency (PCE) of 25.65% (certified 25.45%, certified steady‐state efficiency 25.06%), along with retaining 96.5% of the initial PCE after 1800 h of 1‐sun operation at 55 °C in air.
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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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