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Research Article

Full-scale chemical and field-effect passivation: 21.52% efficiency of stable MAPbI3 solar cells via benzenamine modification

Fengyou Wang1,2,3Meifang Yang1,3Yuhong Zhang1,3Jinyue Du1,3Shuo Yang4Lili Yang1,2,3( )Lin Fan1,2,3Yingrui Sui1,2,3Yunfei Sun1Jinghai Yang1,2,3( )
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China
Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, China
College of Science, Changchun University, Changchun 130022, China
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Abstract

Organic-inorganic metal halide perovskite solar cells have achieved high efficiency of 25.5%. Finding an effective means to suppress the formation of traps and correlate stability losses are thought to be a promising route for further increasing the photovoltaic performance and commercialization potential of perovskite photovoltaic devices. Herein, we report a facile passivation model, which uses a multi-functional organic molecule to simultaneously realize the chemical passivation and field-effect passivation for the perovskite film by an upgraded anti-solvent coating method, which reduces the trap states density of the perovskite, improves interface charge transfer, and thus promotes device performance. In addition, the hydrophobic groups of the molecules can form a moisture-repelling barrier on the perovskite grains, which apparently promotes the humidity stability of the solar cells. Therefore, the optimal power conversion efficiency (PCE) of perovskite solar cells after synergistic passivation reaches 21.52%, and it can still retain 95% of the original PCE when stored in ~ 40% humidity for 30 days. Our findings extend the scope for traps passivation to further promote both the photovoltaic performance and the stability of the perovskite solar cells.

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Nano Research
Pages 2783-2789
Cite this article:
Wang F, Yang M, Zhang Y, et al. Full-scale chemical and field-effect passivation: 21.52% efficiency of stable MAPbI3 solar cells via benzenamine modification. Nano Research, 2021, 14(8): 2783-2789. https://doi.org/10.1007/s12274-021-3286-2
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Received: 09 October 2020
Revised: 30 November 2020
Accepted: 07 December 2020
Published: 05 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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