Ambient blade-coated perovskite solar cells with high reverse bias stability enabled by polymeric hole transporter design

Chaoyue Zhao, Feifei Wang, Xiaodong Hu, Yaoyao Zhang, Tianxiao Liu, Yangyang Liu, Lingyuan Wang, Siwei Luo, Xiaoyu Shi, Xinsheng Tang, He Yan, Wei Wang and Shangshang Chen ()
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Chaoyue Zhao: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Feifei Wang: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Xiaodong Hu: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Yaoyao Zhang: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Tianxiao Liu: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Yangyang Liu: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Lingyuan Wang: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Siwei Luo: Hong Kong University of Science and Technology, Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction
Xiaoyu Shi: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Xinsheng Tang: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
He Yan: Hong Kong University of Science and Technology, Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction
Wei Wang: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering
Shangshang Chen: Nanjing University, State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High-Performance Polymer Materials & Technology, School of Chemistry and Chemical Engineering

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Reverse bias stability remains a critical challenge for inverted perovskite solar cells (PSCs). While self-assembled monolayers (SAMs) boost efficiency, their low breakdown voltages limit device reliability. Thick PTAA layer improves breakdown voltage but suffers from poor wettability and efficiency loss, with unclear effects on device reverse bias stability. Here, we use electroluminescence mapping to reveal the critical role of hole transport layer (HTL) uniformity in affecting device reverse bias stability, and poor uniformity of current HTLs causes spatial heterogeneity that is not able to block electron injection and leads to device breakdown under reverse bias. Based on our study, we develop a polymeric Poly-PhPACz HTL with high conductivity and good wettability, achieving a breakdown voltage comparable to PTAA while maintaining high efficiencies across varying thicknesses. Ambient blade-coated Poly-PhPACz PSCs achieve 26.1% efficiency and retain 92% performance after 1,800 hours of light soaking. Further optimization yields a high breakdown voltage of −14.3 V without sacrificing efficiency, offering a promising pathway for stable PSCs.

Date: 2025
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DOI: 10.1038/s41467-025-65341-7

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