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- Title
Avoiding Structural Collapse to Reduce Lead Leakage in Perovskite Photovoltaics.
- Authors
Wei, Xueyuan; Xiao, Mengqi; Wang, Boyu; Wang, Chenyue; Li, Yuekang; Dou, Jing; Cui, Zhenhua; Dou, Jie; Wang, Hailiang; Ma, Sai; Zhu, Cheng; Yuan, Guizhou; Yang, Ning; Song, Tinglu; Zhou, Huanping; Chen, Haining; Bai, Yang; Chen, Qi
- Abstract
Perovskite solar cells (PSCs) have become a promising candidate for the next‐generation photovoltaic technologies. As an essential element for high‐efficiency PSCs however, the heavy metal Pb is soluble in water, causing a serious threat to the environment and human health. Due to the weak ionic bonding in three‐dimensional (3D) perovskites, drastic structure decomposition occurs when immersing the perovskite film in water, which accelerates the Pb leakage. By introducing the chemically stable Dion‐Jacobson (DJ) 2D perovskite at the 3D perovskite surface, the film dissolution is significantly slowed down, which retards lead leakage. As a result, the Pb contamination is dramatically reduced under various extreme conditions. In addition, the PSCs device deliver a power conversion efficiency (PCE) of 23.6 % and retain over 95 % of their initial PCE after the maximum power point tracking for over 1100 h.
- Subjects
PEROVSKITE; PHOTOVOLTAIC power generation; SOLAR cells; LEAKAGE; IONIC bonds; PHOTOVOLTAIC power systems; CESIUM compounds; HEAVY metals
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 27, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202204314