Particle decoration enables solution-processed perovskite integration with fully-textured silicon for efficient tandem solar cells

Naihe Liu, Gao Zhang, Meng Wei, Lijun Yang, Hangyu Gu, Lirong Zeng, Xin Zhang, Yuwei Geng, Ying Zhu, Chengxia Shen, Yongyi Wu, Tao Li, Wei Wang, Xiaolei Li, Kaifu Qiu, Peicheng Wei, Guanjun Yang (), Jinsong Huang () and Bo Chen ()
Additional contact information
Naihe Liu: Xi’an Jiaotong University
Gao Zhang: Xi’an Jiaotong University
Meng Wei: Xi’an Jiaotong University
Lijun Yang: Xi’an Jiaotong University
Hangyu Gu: The University of North Carolina at Chapel Hill
Lirong Zeng: Xi’an Jiaotong University
Xin Zhang: Xi’an Jiaotong University
Yuwei Geng: Xi’an Jiaotong University
Ying Zhu: Xi’an Jiaotong University
Chengxia Shen: Xi’an Jiaotong University
Yongyi Wu: Xi’an Jiaotong University
Tao Li: Xi’an Jiaotong University
Wei Wang: Xi’an Jiaotong University
Xiaolei Li: Zhejiang Aiko Solar Energy Technology Co. Ltd.
Kaifu Qiu: Zhejiang Aiko Solar Energy Technology Co. Ltd.
Peicheng Wei: Zhejiang Aiko Solar Energy Technology Co. Ltd.
Guanjun Yang: Xi’an Jiaotong University
Jinsong Huang: The University of North Carolina at Chapel Hill
Bo Chen: Xi’an Jiaotong University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Perovskite/silicon tandem solar cells can exceed Shockley-Queisser limit, but achieving complete coverage of 2-4 μm pyramids on industrial fully-textured silicon with solution-processed perovskite film remains challenging. We address this issue by spray-coating alumina particles onto fully-textured silicon, creating a super-hydrophilic rough surface that both enhances wet film coverage and provides guided nucleation sites. Although super-hydrophilic effect enhances wetting, it alone is insufficient to achieve complete coverage of pyramids by perovskite film. Beyond enhanced wetting, alumina particles promote uniform nucleation at particle-decorated sites across pyramids by lowering nucleation barrier and suppressing valley-preferred nucleation, which enables near-conformal deposition of perovskite film on pyramids. Additionally, alumina particles reduce nonradiative recombination and extend carrier lifetimes. Using this approach, we achieve a efficiency of 32.74% for perovskite/silicon tandem solar cells with one-step solution-processed perovskite on fully-textured silicon. This strategy offers a pathway for seamless integration of perovskite and silicon photovoltaics into high-performance tandem devices.

Date: 2025
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DOI: 10.1038/s41467-025-64546-0

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