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Tannic acid as a multifunctional bridge driving structural ordering and surface passivation of ZnO for over 20% efficiency inverted solar cells with improved stability

Energy Environ. Sci., 2026, 19,3834-3844
DOI: 10.1039/D6EE01017B, Paper
Yurong He, Wentao Miao, Jianhua Han, Wenyang Luo, Zhuang Li, Jin Chen, Liangliang Chen, Xunchang Wang, Renqiang Yang
Tannic acid, a natural polyphenol, reduces structural disorder and passivates surface defects in ZnO transport layers, leading to a record efficiency of 20.1% in inverted organic solar cells and extending the device lifetime from 93 to 2808 hours.
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