Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells

Wenzhu Liu; Jianhua Shi; Liping Zhang; Anjun Han; Shenglei Huang; Xiaodong Li; Jun Peng; Yuhao Yang; Yajun Gao; Jian Yu; Kai Jiang; Xinbo Yang; Zhenfei Li; Wenjie Zhao; Junlin Du; Xin Song; Jun Yin; Jie Wang; Youlin Yu; Qiang Shi; Zhixin Ma; Haichuan Zhang; Jiajia Ling; Lujia Xu; Jingxuan Kang; Fuzong Xu; Jiang Liu; Hanyuan Liu; Yi Xie; Fanying Meng; Stefaan De Wolf; Frederic Laquai; Zengfeng Di; Zhengxin Liu

doi:10.1038/s41560-022-01018-5

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Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells

Journal article

Open access

Peer reviewed

Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells

Wenzhu Liu, Jianhua Shi, Liping Zhang, Anjun Han, Shenglei Huang, Xiaodong Li, Jun Peng, Yuhao Yang, Yajun Gao, Jian Yu, …

NATURE ENERGY, Vol.7(5), pp.427-437

01/05/2022

DOI: https://doi.org/10.1038/s41560-022-01018-5

Abstract

Energy & Fuels

Materials Science

Materials Science, Multidisciplinary

Science & Technology

Technology

Recent achievements in amorphous/crystalline silicon heterojunction (SHJ) solar cells and perovskite/SHJ tandem solar cells place hydrogenated amorphous silicon (a-Si:H) at the forefront of photovoltaics. Due to the extremely low effective doping efficiency of trivalent boron in amorphous tetravalent silicon, light harvesting of aforementioned devices is limited by their fill factors (FFs), a direct metric of the charge carrier transport. It is challenging but crucial to develop highly conductive doped a-Si:H with minimal FF losses. Here we report that light soaking can efficiently boost the dark conductance of boron-doped a-Si:H thin films. Light induces diffusion and hopping of weakly bound hydrogen atoms, which activates boron doping. The effect is reversible and the dark conductivity decreases over time when the solar cell is no longer illuminated. By implementing this effect to SHJ solar cells, we achieved a certified total-area power conversion efficiency of 25.18% with a FF of 85.42% on a 244.63 cm(2) wafer.

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Title: Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells
Creators - without role: Wenzhu Liu - Shanghai Institute of Microsystem and Information Technology
Jianhua Shi - Chinese Acad Sci, Res Ctr New Energy Technol, Shanghai Inst Microsyst & Informat Technol SIMIT, Shanghai, Peoples R China
Liping Zhang - Shanghai Institute of Microsystem and Information Technology
Anjun Han - Shanghai Institute of Microsystem and Information Technology
Shenglei Huang - Shanghai Institute of Microsystem and Information Technology
Xiaodong Li - Shanghai Institute of Microsystem and Information Technology
Jun Peng - Australian National University
Yuhao Yang - Shanghai Institute of Microsystem and Information Technology
Yajun Gao - King Abdullah University of Science and Technology
Jian Yu - Southwest Petroleum University
Kai Jiang - Shanghai Institute of Microsystem and Information Technology
Xinbo Yang - Soochow University
Zhenfei Li - Shanghai Institute of Microsystem and Information Technology
Wenjie Zhao - Shanghai Institute of Microsystem and Information Technology
Junlin Du - Chinese Acad Sci, Res Ctr New Energy Technol, Shanghai Inst Microsyst & Informat Technol SIMIT, Shanghai, Peoples R China
Xin Song - Changzhou University
Jun Yin - King Abdullah University of Science and Technology
Jie Wang - Central South University
Youlin Yu - Chinese Acad Sci, Res Ctr New Energy Technol, Shanghai Inst Microsyst & Informat Technol SIMIT, Shanghai, Peoples R China
Qiang Shi - Shanghai Institute of Microsystem and Information Technology
Zhixin Ma - Chinese Acad Sci, Res Ctr New Energy Technol, Shanghai Inst Microsyst & Informat Technol SIMIT, Shanghai, Peoples R China
Haichuan Zhang - Beijing Solar Energy Research Institute
Jiajia Ling - UISEE Technol Shanghai Co, Shanghai, Peoples R China
Lujia Xu - King Abdullah University of Science and Technology
Jingxuan Kang - King Abdullah University of Science and Technology
Fuzong Xu - King Abdullah University of Science and Technology
Jiang Liu - King Abdullah University of Science and Technology
Hanyuan Liu - Beijing Solar Energy Research Institute
Yi Xie - Beijing Solar Energy Research Institute
Fanying Meng - Shanghai Institute of Microsystem and Information Technology
Stefaan De Wolf - King Abdullah University of Science and Technology
Frederic Laquai - King Abdullah University of Science and Technology
Zengfeng Di - Shanghai Institute of Microsystem and Information Technology
Zhengxin Liu - Shanghai Institute of Microsystem and Information Technology
Publication Details: NATURE ENERGY, Vol.7(5), pp.427-437
Publisher: NATURE PORTFOLIO
Number of pages: 11
Grant note: 62074153 / National Natural Science Foundations of China; National Natural Science Foundation of China (NSFC) 19DZ1207602 / Science and Technology Commission of Shanghai Municipality; Science & Technology Commission of Shanghai Municipality (STCSM)
Identifiers: 9943701608331
Academic Unit: King Abdullah University of Science & Technology
Language: English
Resource Type: Journal article