Spatiotemporally homogeneous crystallization for ambient scalable perovskite photovoltaics

IF 47.3 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2026-07-16 DOI:10.1126/science.aef1969

Binlou Gao, Yang Zhong, Xiao Luo, Jiacheng He, Junxi Guo, Xueying Wang, Yikun Liu, Licheng Tan, Yiwang Chen

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引用次数: 0

Abstract

Commercializing perovskite solar cells (PSCs) will likely require the scalable deposition of homogeneous perovskite films under ambient conditions. However, the spatially heterogeneous degradation of metastable perovskites during prolonged coating leads to nonuniformity. Here, we demonstrate spatiotemporally homogeneous crystallization of α-phase FAPbI₃ (where FA is formamidinium) enabled by a phase-locking strategy that establishes a dynamically evolving, moisture-buffering intergranular network during large-area printing. This method prevents the premature degradation caused by ambient humidity, eliminating directional inhomogeneity. Blade-coated PSCs achieved a 26.7% power conversion efficiency (PCE; 26.1% certified), and rigid and flexible 100-square-centimeter modules reached 21.5 and 19.5%, respectively. Improved morphological homogeneity mitigated localized degradation and suppressed self-amplifying aging pathways. Encapsulated devices retained more than 90% of their initial PCE after 1500 hours of 85°C maximum power point tracking in ambient air.

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环境可伸缩钙钛矿光伏电池的时空均匀结晶

钙钛矿太阳能电池（PSCs）的商业化可能需要在环境条件下可扩展地沉积均匀的钙钛矿薄膜。然而，亚稳钙钛矿在长时间涂层过程中的空间非均质降解导致了涂层的不均匀性。在这里，我们展示了α-相FAPbI3（其中FA是甲酰胺）的时空均匀结晶，通过锁相策略实现，该策略在大面积印刷过程中建立了动态演变的湿缓冲晶间网络。这种方法防止了环境湿度引起的过早退化，消除了方向不均匀性。叶片涂层的PSCs实现了26.7%的功率转换效率（PCE； 26.1%认证），刚性和柔性100平方厘米模块分别达到21.5%和19.5%。形态学同质性的改善减轻了局部退化，抑制了自扩增的衰老途径。在环境空气中85°C最大功率点跟踪1500小时后，封装设备保留了90%以上的初始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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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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