Efficient perovskite/silicon tandem with asymmetric self-assembly molecule

Lingbo Jia, Simeng Xia, Jian Li, Yuan Qin, Bingbing Pei, Lei Ding, Jun Yin, Tao Du, Zheng Fang, Yue Yin, Jiang Liu (), Ying Yang, Fu Zhang, Xiaoyong Wu, Qiaoyan Li, Shuangshuang Zhao, Hua Zhang, Qibo Li, Qi Jia, Chi Liu, Xiaobing Gu, Bo Liu, Xin Dong, Jie Liu, Tong Liu, Yajun Gao, Miao Yang, Shi Yin, Xiaoning Ru, Hao Chen, Bo Yang, Zilong Zheng, Wencai Zhou, Maofeng Dou, Simin Wang, Shan Gao, Lan Chen, Minghao Qu, Junxiong Lu, Liang Fang, Yichun Wang, Hao Deng, Jia Yu, Xiaohong Zhang, Minghui Li, Xiting Lang, Chuanxiao Xiao, Qin Hu, Chaowei Xue, Linyu Ning, Yongcai He (), Zhenguo Li (), Xixiang Xu () and Bo He ()
Additional contact information
Lingbo Jia: LONGi Green Energy Technology Co. Ltd
Simeng Xia: LONGi Green Energy Technology Co. Ltd
Jian Li: LONGi Green Energy Technology Co. Ltd
Yuan Qin: LONGi Green Energy Technology Co. Ltd
Bingbing Pei: LONGi Green Energy Technology Co. Ltd
Lei Ding: LONGi Green Energy Technology Co. Ltd
Jun Yin: The Hong Kong Polytechnic University
Tao Du: The Hong Kong Polytechnic University
Zheng Fang: Soochow University
Yue Yin: Soochow University
Jiang Liu: LONGi Green Energy Technology Co. Ltd
Ying Yang: LONGi Green Energy Technology Co. Ltd
Fu Zhang: LONGi Green Energy Technology Co. Ltd
Xiaoyong Wu: LONGi Green Energy Technology Co. Ltd
Qiaoyan Li: LONGi Green Energy Technology Co. Ltd
Shuangshuang Zhao: LONGi Green Energy Technology Co. Ltd
Hua Zhang: LONGi Green Energy Technology Co. Ltd
Qibo Li: LONGi Green Energy Technology Co. Ltd
Qi Jia: LONGi Green Energy Technology Co. Ltd
Chi Liu: LONGi Green Energy Technology Co. Ltd
Xiaobing Gu: LONGi Green Energy Technology Co. Ltd
Bo Liu: LONGi Green Energy Technology Co. Ltd
Xin Dong: LONGi Green Energy Technology Co. Ltd
Jie Liu: LONGi Green Energy Technology Co. Ltd
Tong Liu: LONGi Green Energy Technology Co. Ltd
Yajun Gao: LONGi Green Energy Technology Co. Ltd
Miao Yang: LONGi Green Energy Technology Co. Ltd
Shi Yin: LONGi Green Energy Technology Co. Ltd
Xiaoning Ru: LONGi Green Energy Technology Co. Ltd
Hao Chen: LONGi Green Energy Technology Co. Ltd
Bo Yang: LONGi Green Energy Technology Co. Ltd
Zilong Zheng: Beijing University of Technology
Wencai Zhou: Beijing University of Technology
Maofeng Dou: LONGi Green Energy Technology Co. Ltd
Simin Wang: LONGi Green Energy Technology Co. Ltd
Shan Gao: LONGi Green Energy Technology Co. Ltd
Lan Chen: LONGi Green Energy Technology Co. Ltd
Minghao Qu: LONGi Green Energy Technology Co. Ltd
Junxiong Lu: LONGi Green Energy Technology Co. Ltd
Liang Fang: LONGi Green Energy Technology Co. Ltd
Yichun Wang: LONGi Green Energy Technology Co. Ltd
Hao Deng: LONGi Green Energy Technology Co. Ltd
Jia Yu: Soochow University
Xiaohong Zhang: Soochow University
Minghui Li: Chinese Academy of Sciences
Xiting Lang: Chinese Academy of Sciences
Chuanxiao Xiao: Chinese Academy of Sciences
Qin Hu: University of Science and Technology of China
Chaowei Xue: LONGi Green Energy Technology Co. Ltd
Linyu Ning: Soochow University
Yongcai He: LONGi Green Energy Technology Co. Ltd
Zhenguo Li: LONGi Green Energy Technology Co. Ltd
Xixiang Xu: LONGi Green Energy Technology Co. Ltd
Bo He: LONGi Green Energy Technology Co. Ltd

Nature, 2025, vol. 644, issue 8078, 912-919

Abstract: Abstract Achieving highly ordered and uniformly covered self-assembled monolayers with optimal packing configuration on textured silicon substrates remains a critical challenge for further improving the efficiency of perovskite/silicon tandem solar cells1–3. Here we design an asymmetric self-assembled monolayer (named as HTL201) featuring an anchoring group and a spacer flanking a carbazole core, serving as a hole-selective layer for perovskite/silicon tandem solar cells. When compared with symmetric self-assembled monolayers with a nitrogen-bonded phosphonic acid group, the HTL201 molecule shows minimized steric hindrance and improved coverage on the transparent conductive oxide recombination layer. The strong coordination interaction between HTL201 and the perovskite film effectively reduces non-radiative recombination at the buried interface. Notably, the optimized energy-level alignment between the perovskite and HTL201, accompanied by an increase in the quasi-Fermi-level splitting value of the perovskite layer, enables an impressive voltage of nearly 2 V for perovskite/silicon tandem solar cells, resulting in a certified power conversion efficiency of up to 34.58% based on a silicon heterojunction solar cell.

Date: 2025
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DOI: 10.1038/s41586-025-09333-z

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