Amorphous (lysine)2PbI2 layer enhanced perovskite photovoltaics

Yehui Wen, Tianchi Zhang, Xingtao Wang, Tiantian Liu, Yu Wang, Rui Zhang, Miao Kan, Li Wan, Weihua Ning (), Yong Wang () and Deren Yang ()
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Yehui Wen: Zhejiang University
Tianchi Zhang: Zhejiang University
Xingtao Wang: Huaneng Clean Energy Research Institute
Tiantian Liu: Xi’an University of Architecture and Technology
Yu Wang: Linköping University
Rui Zhang: Linköping University
Miao Kan: East China University of Science and Technology
Li Wan: Max Planck Institute of Microstructure Physics
Weihua Ning: Soochow University
Yong Wang: Zhejiang University
Deren Yang: Zhejiang University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Passivation materials play a crucial role in a wide range of high-efficiency, high-stability photovoltaic applications based on crystalline silicon and state-of-the-art perovskite materials. Currently, for perovskite photovoltaic, the mainstream passivation strategies routinely rely on crystalline materials. Herein, we have invented a new amorphous (lysine)2PbI2 layer-enhanced halide perovskite. By utilizing a solid phase reaction between PbI2 and lysine molecule, an amorphous (lysine)2PbI2 layer is formed at surface/grain boundaries in the perovskite films. The amorphous (lysine)2PbI2 with fewer dangling bonds can effectively neutralize surface/interface defects, achieving an impressive efficiency of 26.27% (certified 25.94%). Moreover, this amorphous layer not only reduces crystal lattice stress but also functions as a barrier against the decomposition of organic components, leading to suppressed de-structuring of perovskite and highly stable perovskite solar cells.

Date: 2024
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DOI: 10.1038/s41467-024-51551-y

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