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

Author

Listed:
  • Wenzhu Liu

    (Chinese Academy of Sciences (CAS))

  • Jianhua Shi

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company)

  • Liping Zhang

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company)

  • Anjun Han

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company)

  • Shenglei Huang

    (Chinese Academy of Sciences (CAS))

  • Xiaodong Li

    (Chinese Academy of Sciences (CAS))

  • Jun Peng

    (The Australian National University)

  • Yuhao Yang

    (Chinese Academy of Sciences (CAS))

  • Yajun Gao

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Jian Yu

    (Southwest Petroleum University)

  • Kai Jiang

    (Chinese Academy of Sciences (CAS))

  • Xinbo Yang

    (Soochow University)

  • Zhenfei Li

    (Chinese Academy of Sciences (CAS))

  • Wenjie Zhao

    (Chinese Academy of Sciences (CAS))

  • Junlin Du

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company)

  • Xin Song

    (Changzhou University)

  • Jun Yin

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Jie Wang

    (Central South University)

  • Youlin Yu

    (Chinese Academy of Sciences (CAS))

  • Qiang Shi

    (Chinese Academy of Sciences (CAS))

  • Zhixin Ma

    (Chinese Academy of Sciences (CAS))

  • Haichuan Zhang

    (Zhongwei New Energy (Chengdu) Company
    Tongwei Solar Company)

  • Jiajia Ling

    (UISEE Technologies (Shanghai) Company)

  • Lujia Xu

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Jingxuan Kang

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Fuzong Xu

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Jiang Liu

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Hanyuan Liu

    (Zhongwei New Energy (Chengdu) Company
    Tongwei Solar Company)

  • Yi Xie

    (Zhongwei New Energy (Chengdu) Company
    Tongwei Solar Company)

  • Fanying Meng

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company)

  • Stefaan Wolf

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Frédéric Laquai

    (King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC))

  • Zengfeng Di

    (Chinese Academy of Sciences)

  • Zhengxin Liu

    (Chinese Academy of Sciences (CAS)
    Zhongwei New Energy (Chengdu) Company
    Tongwei Solar Company)

Abstract

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 cm2 wafer.

Suggested Citation

  • 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 S, 2022. "Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells," Nature Energy, Nature, vol. 7(5), pages 427-437, May.
    • Handle: RePEc:nat:natene:v:7:y:2022:i:5:d:10.1038_s41560-022-01018-5
    DOI: 10.1038/s41560-022-01018-5
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    References listed on IDEAS

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    1. Volker L. Deringer & Noam Bernstein & Gábor Csányi & Chiheb Mahmoud & Michele Ceriotti & Mark Wilson & David A. Drabold & Stephen R. Elliott, 2021. "Origins of structural and electronic transitions in disordered silicon," Nature, Nature, vol. 589(7840), pages 59-64, January.
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    Cited by:

    1. Santhosh Sivaraj & Rajasekar Rathanasamy & Gobinath Velu Kaliyannan & Hitesh Panchal & Ali Jawad Alrubaie & Mustafa Musa Jaber & Zafar Said & Saim Memon, 2022. "A Comprehensive Review on Current Performance, Challenges and Progress in Thin-Film Solar Cells," Energies, MDPI, vol. 15(22), pages 1-34, November.
    2. Hao Lin & Miao Yang & Xiaoning Ru & Genshun Wang & Shi Yin & Fuguo Peng & Chengjian Hong & Minghao Qu & Junxiong Lu & Liang Fang & Can Han & Paul Procel & Olindo Isabella & Pingqi Gao & Zhenguo Li & X, 2023. "Silicon heterojunction solar cells with up to 26.81% efficiency achieved by electrically optimized nanocrystalline-silicon hole contact layers," Nature Energy, Nature, vol. 8(8), pages 789-799, August.

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