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Interfacial Haloplumbate Modulation for Efficient and Stable Hybrid Perovskite Photovoltaics

submitted on 28.03.2021, 17:32 and posted on 30.03.2021, 05:33 by Huanhuan Wang, Zhuang Zhang, Jovana V. Milić, Liguo Tan, Zaiwei Wang, Rong Chen, Xin Jing, Chenyi Yi, Yi Ding, Yuelong Li, Ying Zhao, Xiaodan Zhang, Anders Hagfeldt, Michael Grätzel, Jingshan Luo

The commercialization of perovskite solar cells is mainly limited by their operational stability. Interlayer modification by thin interface materials between the perovskite and the charge transport layers is one of the most effective methods to promote the efficiency and stability of perovskite devices. However, the commonly used interlayer materials do not meet all the demands, including good film quality, excellent stability, and passivation capability without interfering with the charge transport. In this work, we propose a new material, water stable haloplumbate [TBA]PbI3 for interfacial modification, which is formed on the perovskite surface in-situ by tetra-butylammonium iodide (TBAI) treatment. Benefiting from its passivation effect and robustness, the modified devices result in a power conversion efficiency of 22.90% with excellent environmental and operational stability.


This study was supported by the National Key Research and Development Program of China (Grant No. 2018YFB1502003; 2019YFE0123400), the Tianjin Distinguished Young Scholars Fund (20JCJQJC00260), the Chinese Thousand Talents Program for Young Professionals, the “111” Project (Grant No. B16027), National Natural Science Foundation of China (Grant No. 21872080), and the startup funding of Nankai University. J.V.M. is grateful for the Swiss National Science Foundation no. 193174.


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Nankai University



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Declaration of Conflict of Interest

The authors declare that there is no conflict of interest.