Self-assembled materials with an ordered hydrophilic bilayer for high performance inverted Perovskite solar cells

Geping Qu, Letian Zhang, Ying Qiao, Shaokuan Gong, Yuanjia Ding, Yuli Tao, Siyuan Cai, Xiao-Yong Chang, Qian Chen, Pengfei Xie, Junyuan Feng, Changqin Gao, Guopeng Li, Hui Xiao, Fei Wang, Hanlin Hu, Jie Yang, Shi Chen, Alex K.-Y. Jen (), Xihan Chen () and Zong-Xiang Xu ()
Additional contact information
Geping Qu: Southern University of Science and Technology
Letian Zhang: Southern University of Science and Technology
Ying Qiao: Southern University of Science and Technology
Shaokuan Gong: Southern University of Science and Technology
Yuanjia Ding: Southern University of Science and Technology
Yuli Tao: University of Science and Technology of China
Siyuan Cai: Southern University of Science and Technology
Xiao-Yong Chang: Southern University of Science and Technology
Qian Chen: Southern University of Science and Technology
Pengfei Xie: Southern University of Science and Technology
Junyuan Feng: Southern University of Science and Technology
Changqin Gao: Southern University of Science and Technology
Guopeng Li: Southern University of Science and Technology
Hui Xiao: Northwest Normal University
Fei Wang: Shenzhen Polytechnic University
Hanlin Hu: Shenzhen Polytechnic University
Jie Yang: Henan University
Shi Chen: Henan University
Alex K.-Y. Jen: City University of Hong Kong
Xihan Chen: Southern University of Science and Technology
Zong-Xiang Xu: Southern University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report a self-assembled material based hole-selective layer 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, with a π-expanded conjugation. The enhanced intermolecular π–π interactions facilitate the self-assembly of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid molecules to form an ordered bilayer with a hydrophilic surface, which passivates the buried perovskite interface defect and enables high-quality and large-area perovskite preparation, while simultaneously enhancing interfacial charge extraction and transport. The certified efficiency of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid based small-area (0.0715 cm2) device is 26.39% with high stability. Furthermore, a certified efficiency of 25.21% is achieved for a 99.12 mm2 large area device.

Date: 2025
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DOI: 10.1038/s41467-024-55523-0

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