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.

The low adhesive fracture energy of electron transport layer/perovskite interface makes it prone to delamination under mechanical stress. Here, authors develop polyamide-amine-based hyperbranched polymer to provide strong adhesion, leading to device efficiency of over 25% for perovskite solar cells.

Details

Title
Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage
Author
Li, Zhihao 1 ; Jia, Chunmei 2 ; Wan, Zhi 2 ; Xue, Jiayi 2 ; Cao, Junchao 3 ; Zhang, Meng 4 ; Li, Can 5 ; Shen, Jianghua 3 ; Zhang, Chao 6   VIAFID ORCID Logo  ; Li, Zhen 5   VIAFID ORCID Logo 

1  Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Xi’an, P. R. China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Northwestern Polytechnical University, Department of Aeronautical Structure Engineering, School of Aeronautics, Xi’an, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, Xi’an, China (GRID:grid.440588.5); Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) 
2  Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Xi’an, P. R. China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) 
3  Northwestern Polytechnical University, Department of Aeronautical Structure Engineering, School of Aeronautics, Xi’an, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, Xi’an, China (GRID:grid.440588.5) 
4  Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Xi’an, P. R. China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Northwestern Polytechnical University, Department of Aeronautical Structure Engineering, School of Aeronautics, Xi’an, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) 
5  Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Xi’an, P. R. China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) 
6  Northwestern Polytechnical University, Department of Aeronautical Structure Engineering, School of Aeronautics, Xi’an, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240); Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, Xi’an, China (GRID:grid.440588.5); Northwestern Polytechnical University, School of Civil Aviation, Xi’an, China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) 
Pages
6451
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-023-41931-1
ProQuest document ID
2876793778
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.