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Review | Open Access

Photoinduced phase segregation in wide-bandgap mixed-halide perovskite solar cells

Yue Yu1, Xinxing Liu1, Sam Zhang2,3( ), Jiangzhao Chen1( )
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
School of Aeronautics, Harbin Institute of Technology, Harbin 150001, China
HIT Zhengzhou Research Institute, Zhengzhou 450000, China
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Graphical Abstract

Abstract

Wide-bandgap (WB) mixed-halide perovskite solar cells (PSCs) play a crucial role in perovskite-based tandem solar cells (TSCs), enabling them to exceed the Shockley–Queisser limits of single-junction solar cells. Nonetheless, the lack of stability in WB perovskite films due to photoinduced phase segregation undermines the stability of WB PSCs and their TSCs, thus impeding the commercialization of perovskite-based TSCs. Many efforts have been made to suppress photoinduced phase segregation in WB perovskite films and significant progresses have been obtained. In this review, we elaborate the mechanisms behind photoinduced phase segregation and its impact on the photovoltaic performance and stability of devices. The importance role of advanced characterization techniques in confirming the photoinduced phase segregation are comprehensively summarized. Beyond that, the effective strategies to alleviate photoinduced phase segregation in WB mixed halide PSCs are systematically assessed. Finally, the prospects for developing highly efficient and stable WB PSCs in tandem application are also presented.

Keywords

wide-bandgap perovskitephotoinduced phase segregationmechanismcharacterization

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Energy Materials and Devices
Volume 2 Issue 2,
June 2024
Article number: 9370037
DOI: 10.26599/EMD.2024.9370037
Cite this article:
Yu Y, Liu X, Zhang S, et al. Photoinduced phase segregation in wide-bandgap mixed-halide perovskite solar cells. Energy Materials and Devices, 2024, 2(2): 9370037. https://doi.org/10.26599/EMD.2024.9370037

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Received: 29 April 2024
Revised: 21 May 2024
Accepted: 30 May 2024
Published: 24 June 2024
© The Author(s) 2024. Published by Tsinghua University Press.

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