Halogen Bonding Enable Improved Performance and Stability of Dion–Jacobson Perovskite Solar Cells

Abstract The undesired phase distribution and intrinsic residual lattice strain remain the bottleneck for high‐performance and stable 2D or Q‐2D perovskite solar cells (PSCs), especially for the Dion–Jacobson (DJ) type Q‐2D PSCs. Here, we showcase employing halogen bonds to stabilize the halide anions and fine‐tuning the residual lattice strain by introducing perfluorodecyl iodide (PFI). It reduces the density of iodide species defects and releases the residual tensile strain, leading to more homogenous phase distribution, suppressed carrier recombination, promoted charge transport, enhanced efficiency, and stability. Therefore, DJ PSCs maintain over 81% of initial efficiency after thermal‐light aging (i.e., under 85 °C and 1 sun illumination) for 952 h, and remain over 91% of initial efficiency after under reverse bias (−2.5 V, under ISOS‐V aging tests) for over 21 h, representing one of the most bias‐stable Q‐2D PSCs reported so far.

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Publication Details

Journal
Angewandte Chemie
Published
2025-04-26
DOI
https://doi.org/10.1002/ange.202500131
Primary Topic
Perovskite Materials and Applications
Type
article
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article

Halogen Bonding Enable Improved Performance and Stability of Dion–Jacobson Perovskite Solar Cells

jifei wang, Rui Liang, Guoting Li, Lili Ke et al.
Angewandte Chemie
Perovskite Materials and Applications
article

Halogen Bonding Enable Improved Performance and Stability of Dion–Jacobson Perovskite Solar Cells

jifei wang, Rui Liang, Guoting Li, Lili Ke, Qing-Qing Zou, Yan Chen, Nanliu Liu, Biao Liu, Guozheng Nie, Yongjun Li, Yuanyuan Guo, Bing Ji, Hongpeng Zhou, Yaxin Zhai, Weike Wang, Shiwei Lu, Sijin Liu
article en

Abstract

Abstract The undesired phase distribution and intrinsic residual lattice strain remain the bottleneck for high‐performance and stable 2D or Q‐2D perovskite solar cells (PSCs), especially for the Dion–Jacobson (DJ) type Q‐2D PSCs. Here, we showcase employing halogen bonds to stabilize the halide anions and fine‐tuning the residual lattice strain by introducing perfluorodecyl iodide (PFI). It reduces the density of iodide species defects and releases the residual tensile strain, leading to more homogenous phase distribution, suppressed carrier recombination, promoted charge transport, enhanced efficiency, and stability. Therefore, DJ PSCs maintain over 81% of initial efficiency after thermal‐light aging (i.e., under 85 °C and 1 sun illumination) for 952 h, and remain over 91% of initial efficiency after under reverse bias (−2.5 V, under ISOS‐V aging tests) for over 21 h, representing one of the most bias‐stable Q‐2D PSCs reported so far.

Angewandte ChemieVol. 137(27)
Hunan University of Science and Technology (CN), Central South University (CN), Xinjiang Medical University (CN), Northwestern Polytechnical University (CN), Hunan Normal University (CN), Changsha Normal University (CN), Ministry of Education (IR), Qiannan Normal College For Nationalities (CN), Xiangtan University (CN)
Openalex Percentile: Top 93%
Perovskite Materials and Applications
DOISourceOpenAlex
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