Solvent engineering for scalable fabrication of perovskite/silicon tandem solar cells in air

Xuntian Zheng, Wenchi Kong (), Jin Wen, Jiajia Hong, Haowen Luo, Rui Xia, Zilong Huang, Xin Luo, Zhou Liu, Hongjiang Li, Hongfei Sun, Yurui Wang, Chenshuaiyu Liu, Pu Wu, Han Gao, Manya Li, Anh Dinh Bui, Yi Mo, Xueling Zhang, Guangtao Yang, Yifeng Chen, Zhiqiang Feng, Hieu T. Nguyen, Renxing Lin, Ludong Li, Jifan Gao () and Hairen Tan ()
Additional contact information
Xuntian Zheng: Nanjing University
Wenchi Kong: Nanjing University
Jin Wen: Nanjing University
Jiajia Hong: Nanjing University
Haowen Luo: Nanjing University
Rui Xia: Trina Solar
Zilong Huang: Nanjing University
Xin Luo: Nanjing University
Zhou Liu: Nanjing University
Hongjiang Li: Trina Solar
Hongfei Sun: Nanjing University
Yurui Wang: Nanjing University
Chenshuaiyu Liu: Nanjing University
Pu Wu: Nanjing University
Han Gao: Nanjing University
Manya Li: Nanjing University
Anh Dinh Bui: The Australian National University
Yi Mo: Trina Solar
Xueling Zhang: Trina Solar
Guangtao Yang: Trina Solar
Yifeng Chen: Trina Solar
Zhiqiang Feng: Trina Solar
Hieu T. Nguyen: The Australian National University
Renxing Lin: Nanjing University
Ludong Li: Nanjing University
Jifan Gao: Trina Solar
Hairen Tan: Nanjing University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Perovskite/silicon tandem solar cells hold great promise for realizing high power conversion efficiency at low cost. However, achieving scalable fabrication of wide-bandgap perovskite (~1.68 eV) in air, without the protective environment of an inert atmosphere, remains challenging due to moisture-induced degradation of perovskite films. Herein, this study reveals that the extent of moisture interference is significantly influenced by the properties of solvent. We further demonstrate that n-Butanol (nBA), with its low polarity and moderate volatilization rate, not only mitigates the detrimental effects of moisture in air during scalable fabrication but also enhances the uniformity of perovskite films. This approach enables us to achieve an impressive efficiency of 29.4% (certified 28.7%) for double-sided textured perovskite/silicon tandem cells featuring large-size pyramids (2–3 μm) and 26.3% over an aperture area of 16 cm2. This advance provides a route for large-scale production of perovskite/silicon tandem solar cells, marking a significant stride toward their commercial viability.

Date: 2024
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DOI: 10.1038/s41467-024-49351-5

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