journal article·2024-11

Multiple Dynamic Hydrogen Bonding Networks Boost the Mechanical Stability of Flexible Perovskite Solar Cells

Siyuan Zhu, Xi Jin, Wenyan Tan, Yu Zhang, Guijie Zhao, Xinyue Wang, Yuxuan Yang, Chao Zhou, Zhaoheng Tang, Xiaoxue Wu, Xueyuan Gong, Cheng Zhu, Qi Chen, Zonghao Liu, Peng Song, Minghua Li, Jinsong Hu, Qijie Liang, Yong Ding, Yan Jiang

Advanced Functional Materials· Volume 34· Issue 48
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Abstract

Abstract Flexible perovskite solar cells often experience constant or cyclic bending during their service life. Catastrophic failure of devices may occur due to the crack of polycrystalline perovskite films and delamination at the perovskite and the substrate interfaces, posing a significant stability concern. Here, a multiple dynamic hydrogen bonding polymer network is developed to enhance the mechanical strength of flexible perovskite solar cells in two ways. The main chain of poly(acrylic acid) decreases the mismatch of the coefficient of thermal expansion between the perovskite and the substrate by 16.7% through its flexibility and spatial occupation. The dopamine branch chains provide multiple dynamic hydrogen bonding sites, which contribute to increased energy dissipation upon stress deformation and reduce Young's modulus of perovskite by 54.3%. The inverted flexible perovskite solar cells achieve a champion power conversion efficiency of 23.02% and retain 81.3% of the initial PCE over 2000 h under continuous 1‐sun equivalent illumination. Moreover, devices show excellent mechanical stability by remaining 90.2% of the original value after 5000 bending cycles.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Liaoning University Shenyang 110036 China

Department School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

Songshan Lake Materials Laboratory Dongguan 523429 China

MOE Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631 China

School of Chemical Engineering and Technology Tianjin University 135 Yaguan Road Tianjin 300350 China

School of Physics and Materials Science Guangzhou University Guangzhou 510006 China

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Wuhan National Laboratory for Optoelectronics (WNLO) Huazhong University of Science and Technology (HUST) Wuhan 430074 China

Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Chemical Engineering College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Songshan Lake Materials Laboratory

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