Buried interface molecular hybrid for inverted perovskite solar cells

Sanwan Liu, Jingbai Li, Wenshan Xiao, Rui Chen, Zhenxing Sun, Yong Zhang, Xia Lei, Shuaifeng Hu, Manuel Kober-Czerny, Jianan Wang, Fumeng Ren, Qisen Zhou, Hasan Raza, You Gao, Yitong Ji, Sibo Li, Huan Li, Longbin Qiu, Wenchao Huang, Yan Zhao, Baomin Xu, Zonghao Liu (), Henry J. Snaith, Nam-Gyu Park () and Wei Chen ()
Additional contact information
Sanwan Liu: Huazhong University of Science and Technology (HUST)
Jingbai Li: Shenzhen Polytechnic University
Wenshan Xiao: Wuhan University of Technology
Rui Chen: Huazhong University of Science and Technology (HUST)
Zhenxing Sun: Huazhong University of Science and Technology (HUST)
Yong Zhang: Southern University of Science and Technology
Xia Lei: Shenzhen Polytechnic University
Shuaifeng Hu: University of Oxford
Manuel Kober-Czerny: University of Oxford
Jianan Wang: Huazhong University of Science and Technology (HUST)
Fumeng Ren: Huazhong University of Science and Technology (HUST)
Qisen Zhou: Huazhong University of Science and Technology (HUST)
Hasan Raza: Huazhong University of Science and Technology (HUST)
You Gao: Huazhong University of Science and Technology (HUST)
Yitong Ji: Wuhan University of Technology
Sibo Li: Southern University of Science and Technology
Huan Li: Southern University of Science and Technology
Longbin Qiu: Southern University of Science and Technology
Wenchao Huang: Wuhan University of Technology
Yan Zhao: Sichuan University
Baomin Xu: Southern University of Science and Technology
Zonghao Liu: Huazhong University of Science and Technology (HUST)
Henry J. Snaith: University of Oxford
Nam-Gyu Park: Sungkyunkwan University (SKKU)
Wei Chen: Huazhong University of Science and Technology (HUST)

Nature, 2024, vol. 632, issue 8025, 536-542

Abstract: Abstract Perovskite solar cells with an inverted architecture provide a key pathway for commercializing this emerging photovoltaic technology because of the better power conversion efficiency and operational stability compared with the normal device structure. Specifically, power conversion efficiencies of the inverted perovskite solar cells have exceeded 25% owing to the development of improved self-assembled molecules1–5 and passivation strategies6–8. However, poor wettability and agglomeration of self-assembled molecules9–12 cause interfacial losses, impeding further improvement in the power conversion efficiency and stability. Here we report a molecular hybrid at the buried interface in inverted perovskite solar cells that co-assembled the popular self-assembled molecule [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) with the multiple aromatic carboxylic acid 4,4′,4″-nitrilotribenzoic acid (NA) to improve the heterojunction interface. The molecular hybrid of Me-4PACz with NA could substantially improve the interfacial characteristics. The resulting inverted perovskite solar cells demonstrated a record certified steady-state efficiency of 26.54%. Crucially, this strategy aligns seamlessly with large-scale manufacturing, achieving one of the highest certified power conversion efficiencies for inverted mini-modules at 22.74% (aperture area 11.1 cm2). Our device also maintained 96.1% of its initial power conversion efficiency after more than 2,400 h of 1-sun operation in ambient air.

Date: 2024
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DOI: 10.1038/s41586-024-07723-3

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