Amorphous (lysine)2PbI2 layer enhanced perovskite photovoltaics

Wen, Yehui; Zhang, Tianchi; Wang, Xingtao; Liu, Tiantian; Wang, Yu; Zhang, Rui; Kan, Miao; Wan, Li; Ning, Weihua; Wang, Yong; Yang, Deren

doi:10.1038/s41467-024-51551-y

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Amorphous (lysine)₂PbI₂ layer enhanced perovskite photovoltaics

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Wan, Li
Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Wen, Y., Zhang, T., Wang, X., Liu, T., Wang, Y., Zhang, R., et al. (2024). Amorphous (lysine)₂PbI₂ layer enhanced perovskite photovoltaics. Nature Communications, 15: 7085. doi:10.1038/s41467-024-51551-y.

Cite as: https://hdl.handle.net/21.11116/0000-000F-CF9C-9

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.