A binary 2D perovskite passivation for efficient and stable perovskite/silicon tandem solar cells

Fengtao Pei, Yihua Chen, Qianqian Wang, Liang Li, Yue Ma, Huifen Liu, Ye Duan, Tinglu Song, Haipeng Xie, Guilin Liu, Ning Yang, Ying Zhang, Wentao Zhou, Jiaqian Kang, Xiuxiu Niu, Kailin Li, Feng Wang, Mengqi Xiao, Guizhou Yuan, Yuetong Wu, Cheng Zhu, Xueyun Wang, Huanping Zhou, Yiliang Wu and Qi Chen ()
Additional contact information
Fengtao Pei: Beijing Institute of Technology
Yihua Chen: Beijing Institute of Technology
Qianqian Wang: Beijing Institute of Technology
Liang Li: Peking University
Yue Ma: Beijing Institute of Technology
Huifen Liu: Peking University
Ye Duan: Peking University
Tinglu Song: Beijing Institute of Technology
Haipeng Xie: Central South University
Guilin Liu: Jiangnan University
Ning Yang: Beijing Institute of Technology
Ying Zhang: Beijing Institute of Technology
Wentao Zhou: Peking University
Jiaqian Kang: Beijing Institute of Technology
Xiuxiu Niu: Beijing Institute of Technology
Kailin Li: Peking University
Feng Wang: Peking University
Mengqi Xiao: Beijing Institute of Technology
Guizhou Yuan: Beijing Institute of Technology
Yuetong Wu: Peking University
Cheng Zhu: Beijing Institute of Technology
Xueyun Wang: Beijing Institute of Technology
Huanping Zhou: Peking University
Yiliang Wu: Ltd.
Qi Chen: Beijing Institute of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract To achieve high power conversion efficiency in perovskite/silicon tandem solar cells, it is necessary to develop a promising wide-bandgap perovskite absorber and processing techniques in relevance. To date, the performance of devices based on wide-bandgap perovskite is still limited mainly by carrier recombination at their electron extraction interface. Here, we demonstrate assembling a binary two-dimensional perovskite by both alternating-cation-interlayer phase and Ruddlesden−Popper phase to passivate perovskite/C60 interface. The binary two-dimensional strategy takes effects not only at the interface but also in the bulk, which enables efficient charge transport in a wide-bandgap perovskite solar cell with a stabilized efficiency of 20.79% (1 cm2). Based on this absorber, a monolithic perovskite/silicon tandem solar cell is fabricated with a steady-state efficiency of 30.65% assessed by a third party. Moreover, the tandem devices retain 96% of their initial efficiency after 527 h of operation under full spectral continuous illumination, and 98% after 1000 h of damp-heat testing (85 °C with 85% relative humidity).

Date: 2024
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DOI: 10.1038/s41467-024-51345-2

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