Inductive effects in molecular contacts enable wide-bandgap perovskite cells for efficient perovskite/TOPCon tandems

Yixin Luo, Yuan Tian, Ke Zhao, Weiping Mao, Chen Liu, Jiahui Shen, Zhendong Cheng, Caner Değer, Xiaohe Miao, Zhongwei Zhang, Xuechun Sun, Libing Yao, Xu Zhang, Pengju Shi, Donger Jin, Jiaxiao Deng, Mengyuan Tian, Ilhan Yavuz, Na Dong, Ruzhang Liu, Rui Wang, Deren Yang () and Jingjing Xue ()
Additional contact information
Yixin Luo: Zhejiang University
Yuan Tian: Zhejiang University
Ke Zhao: Zhejiang University
Weiping Mao: Jietai New Energy Technology Co., Ltd
Chen Liu: Yangzhou University
Jiahui Shen: Westlake Institute for Advanced Study
Zhendong Cheng: Westlake Institute for Advanced Study
Caner Değer: Ziverbey
Xiaohe Miao: Westlake University
Zhongwei Zhang: Dongfang Electric (Hangzhou) Innovation Institute Co., Ltd.
Xuechun Sun: Zhejiang University
Libing Yao: Westlake Institute for Advanced Study
Xu Zhang: Zhejiang University
Pengju Shi: Zhejiang University
Donger Jin: Zhejiang University
Jiaxiao Deng: Jietai New Energy Technology Co., Ltd
Mengyuan Tian: Jietai New Energy Technology Co., Ltd
Ilhan Yavuz: Ziverbey
Na Dong: Dongfang Electric (Hangzhou) Innovation Institute Co., Ltd.
Ruzhang Liu: Yangzhou University
Rui Wang: Westlake Institute for Advanced Study
Deren Yang: Zhejiang University
Jingjing Xue: Zhejiang University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Organic molecules that serve as hole-selective contacts, known as self-assembled monolayers (SAMs), play a pivotal role in ensuring high-performance perovskite photovoltaics. Optimal energy alignment between the SAM and the perovskite is essential for desired photovoltaic performance. However, many SAMs are studied in optimal-bandgap perovskites, with limited energy level modification specifically catering to wide-bandgap perovskites. Herein, we demonstrate that the energy level of SAMs can be systematically tuned in a stepwise manner via inductive effects in the conjugated moieties, enabling rational design tailored for specific perovskite bandgaps. The resulting WBG perovskite device based on our tuned SAM achieved a power conversion efficiency (PCE) of 22.8%. Integration with crystalline silicon TOPCon subcells further enabled the construction of a perovskite/TOPCon tandem device with a PCE of 31.1% (certified 30.9%).

Date: 2025
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DOI: 10.1038/s41467-025-59896-8

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