Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Zhihao Li; Chunmei Jia; Zhi Wan; Jiayi Xue; Junchao Cao; Meng Zhang; Can Li; Jianghua Shen; Chao Zhang; Zhen Li

doi:10.1038/s41467-023-41931-1

Nature Communications (Oct 2023)

Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Zhihao Li,
Chunmei Jia,
Zhi Wan,
Jiayi Xue,
Junchao Cao,
Meng Zhang,
Can Li,
Jianghua Shen,
Chao Zhang,
Zhen Li

Affiliations

Zhihao Li: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Chunmei Jia: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Zhi Wan: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Jiayi Xue: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Junchao Cao: Department of Aeronautical Structure Engineering, School of Aeronautics, Northwestern Polytechnical University
Meng Zhang: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Can Li: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
Jianghua Shen: Department of Aeronautical Structure Engineering, School of Aeronautics, Northwestern Polytechnical University
Chao Zhang: Department of Aeronautical Structure Engineering, School of Aeronautics, Northwestern Polytechnical University
Zhen Li: State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)

DOI: https://doi.org/10.1038/s41467-023-41931-1
Journal volume & issue: Vol. 14, no. 1
pp. 1 – 12

Abstract

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Abstract Perovskite solar cells (PSCs) are multilayer structures. The interface between electron transport layer and perovskite is the mechanical weakest point in flexible PSCs due to its low fracture energy. Herein, we develop a highly adhesive polyamide-amine-based hyperbranched polymers to reinforce the interface. The interface fracture energy is improved from 1.08 to 2.13 J·m−2 by the hyperbranched polymers with adhesive groups and dynamic hydrogen bond networks. The polymer functionalized perovskite solar cells achieve superior power conversion efficiencies of 25.05% and 23.86% for rigid and flexible devices, respectively. Furthermore, the hyperbranched polymer contains abundant intramolecular cavities that can capture Pb2+. Pb leakage after solar cell damage is effectively suppressed. Our findings provide insights on designing adhesive interface layers towards high-efficiency, mechanical-stable and environment-friendly flexible perovskite solar cells.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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