Inhibited Crack Development by Compressive Strain in Perovskite Solar Cells with Improved Mechanical Stability

Guizhou Yuan; Wenqiang Xie; Qizhen Song; Sai Ma; Yue Ma; Congbo Shi; Mengqi Xiao; Fengtao Pei; Xiuxiu Niu; Ying Zhang; Jie Dou; Cheng Zhu; Yang Bai; Yiliang Wu; Hao Wang; Qunbo Fan; Qi Chen

doi:10.1002/adma.202211257

Inhibited Crack Development by Compressive Strain in Perovskite Solar Cells with Improved Mechanical Stability

Guizhou Yuan, Wenqiang Xie, Qizhen Song, Sai Ma, Yue Ma, Congbo Shi, Mengqi Xiao, Fengtao Pei, Xiuxiu Niu, Ying Zhang, Jie Dou, Cheng Zhu, Yang Bai, Yiliang Wu, Hao Wang^*, Qunbo Fan, Qi Chen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Metal halide perovskites are promising as next-generation photovoltaic materials, but stability issues are still a huge obstacle to their commercialization. Here, the formation and evolution of cracks in perovskite films during thermal cycling, which affect their mechanical stability, are investigated. Compressive strain is employed to suppress cracks and delamination by in situ formed polymers with low elastic modulus during crystal growth. The resultant devices pass the thermal-cycling qualification (IEC61215:2016), retaining 95% of the initial power conversion efficiency (PCE) and compressive strain after 230 cycles. Meanwhile, the p–i–n devices deliver PCEs of 23.91% (0.0805 cm²) and 23.27% (1 cm²). The findings shed light on strain engineering with respect to their evolution, which enables mechanically stable perovskite solar cells.

Original language	English
Article number	2211257
Journal	Advanced Materials
Volume	35
Issue number	17
DOIs	https://doi.org/10.1002/adma.202211257
Publication status	Published - 26 Apr 2023

Keywords

compressive strain
cracks
mechanically stable perovskite solar cells
thermal cycling

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/adma.202211257

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title = "Inhibited Crack Development by Compressive Strain in Perovskite Solar Cells with Improved Mechanical Stability",

abstract = "Metal halide perovskites are promising as next-generation photovoltaic materials, but stability issues are still a huge obstacle to their commercialization. Here, the formation and evolution of cracks in perovskite films during thermal cycling, which affect their mechanical stability, are investigated. Compressive strain is employed to suppress cracks and delamination by in situ formed polymers with low elastic modulus during crystal growth. The resultant devices pass the thermal-cycling qualification (IEC61215:2016), retaining 95% of the initial power conversion efficiency (PCE) and compressive strain after 230 cycles. Meanwhile, the p–i–n devices deliver PCEs of 23.91% (0.0805 cm2) and 23.27% (1 cm2). The findings shed light on strain engineering with respect to their evolution, which enables mechanically stable perovskite solar cells.",

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author = "Guizhou Yuan and Wenqiang Xie and Qizhen Song and Sai Ma and Yue Ma and Congbo Shi and Mengqi Xiao and Fengtao Pei and Xiuxiu Niu and Ying Zhang and Jie Dou and Cheng Zhu and Yang Bai and Yiliang Wu and Hao Wang and Qunbo Fan and Qi Chen",

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T1 - Inhibited Crack Development by Compressive Strain in Perovskite Solar Cells with Improved Mechanical Stability

AU - Yuan, Guizhou

AU - Xie, Wenqiang

AU - Song, Qizhen

AU - Ma, Sai

AU - Ma, Yue

AU - Shi, Congbo

AU - Xiao, Mengqi

AU - Pei, Fengtao

AU - Niu, Xiuxiu

AU - Zhang, Ying

AU - Dou, Jie

AU - Zhu, Cheng

AU - Bai, Yang

AU - Wu, Yiliang

AU - Wang, Hao

AU - Fan, Qunbo

AU - Chen, Qi

PY - 2023/4/26

Y1 - 2023/4/26

N2 - Metal halide perovskites are promising as next-generation photovoltaic materials, but stability issues are still a huge obstacle to their commercialization. Here, the formation and evolution of cracks in perovskite films during thermal cycling, which affect their mechanical stability, are investigated. Compressive strain is employed to suppress cracks and delamination by in situ formed polymers with low elastic modulus during crystal growth. The resultant devices pass the thermal-cycling qualification (IEC61215:2016), retaining 95% of the initial power conversion efficiency (PCE) and compressive strain after 230 cycles. Meanwhile, the p–i–n devices deliver PCEs of 23.91% (0.0805 cm2) and 23.27% (1 cm2). The findings shed light on strain engineering with respect to their evolution, which enables mechanically stable perovskite solar cells.

AB - Metal halide perovskites are promising as next-generation photovoltaic materials, but stability issues are still a huge obstacle to their commercialization. Here, the formation and evolution of cracks in perovskite films during thermal cycling, which affect their mechanical stability, are investigated. Compressive strain is employed to suppress cracks and delamination by in situ formed polymers with low elastic modulus during crystal growth. The resultant devices pass the thermal-cycling qualification (IEC61215:2016), retaining 95% of the initial power conversion efficiency (PCE) and compressive strain after 230 cycles. Meanwhile, the p–i–n devices deliver PCEs of 23.91% (0.0805 cm2) and 23.27% (1 cm2). The findings shed light on strain engineering with respect to their evolution, which enables mechanically stable perovskite solar cells.

KW - compressive strain

KW - cracks

KW - mechanically stable perovskite solar cells

KW - thermal cycling

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DO - 10.1002/adma.202211257

M3 - Article

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AN - SCOPUS:85150761193

SN - 0935-9648

VL - 35

JO - Advanced Materials

JF - Advanced Materials

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Inhibited Crack Development by Compressive Strain in Perovskite Solar Cells with Improved Mechanical Stability

Abstract

Keywords

UN SDGs

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