Strain regulates the photovoltaic performance of thick-film perovskites

Pengju Shi, Jiazhe Xu, Ilhan Yavuz, Tianyi Huang, Shaun Tan, Ke Zhao, Xu Zhang, Yuan Tian, Sisi Wang, Wei Fan, Yahui Li, Donger Jin, Xuemeng Yu, Chenyue Wang, Xingyu Gao, Zhong Chen, Enzheng Shi, Xihan Chen, Deren Yang, Jingjing Xue (), Yang Yang () and Rui Wang ()
Additional contact information
Pengju Shi: Zhejiang University
Jiazhe Xu: Zhejiang University
Ilhan Yavuz: Marmara University
Tianyi Huang: University of California
Shaun Tan: University of California
Ke Zhao: Zhejiang University
Xu Zhang: Zhejiang University
Yuan Tian: Zhejiang University
Sisi Wang: Westlake Institute for Advanced Study
Wei Fan: Zhejiang University
Yahui Li: Zhejiang University
Donger Jin: Zhejiang University
Xuemeng Yu: Southern University of Science and Technology
Chenyue Wang: Chinese Academy of Sciences
Xingyu Gao: Chinese Academy of Sciences
Zhong Chen: Westlake University
Enzheng Shi: Zhejiang University
Xihan Chen: Southern University of Science and Technology
Deren Yang: Zhejiang University
Jingjing Xue: Zhejiang University
Yang Yang: University of California
Rui Wang: Westlake Institute for Advanced Study

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

Abstract: Abstract Perovskite photovoltaics, typically based on a solution-processed perovskite layer with a film thickness of a few hundred nanometres, have emerged as a leading thin-film photovoltaic technology. Nevertheless, many critical issues pose challenges to its commercialization progress, including industrial compatibility, stability, scalability and reliability. A thicker perovskite film on a scale of micrometres could mitigate these issues. However, the efficiencies of thick-film perovskite cells lag behind those with nanometre film thickness. With the mechanism remaining elusive, the community has long been under the impression that the limiting factor lies in the short carrier lifetime as a result of defects. Here, by constructing a perovskite system with extraordinarily long carrier lifetime, we rule out the restrictions of carrier lifetime on the device performance. Through this, we unveil the critical role of the ignored lattice strain in thick films. Our results provide insights into the factors limiting the performance of thick-film perovskite devices.

Date: 2024
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DOI: 10.1038/s41467-024-47019-8

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