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Controlling Selenization Equilibrium Enables High-Quality Kesterite Absorbers for Efficient Solar Cells

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Listed:
  • Xiao Xu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Jiazheng Zhou

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Kang Yin

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Jinlin Wang

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Licheng Lou

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Menghan Jiao

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Bowen Zhang

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences)

  • Dongmei Li

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Jiangjian Shi

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS))

  • Huijue Wu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS))

  • Yanhong Luo

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Qingbo Meng

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS)
    Songshan Lake Materials Laboratory
    University of Chinese Academy of Sciences)

Abstract

Kesterite Cu2ZnSn(S, Se)4 is considered one of the most competitive photovoltaic materials due to its earth-abundant and nontoxic constituent elements, environmental friendliness, and high stability. However, the preparation of high-quality Kesterite absorbers for photovoltaics is still challenging for the uncontrollability and complexity of selenization reactions between metal element precursors and selenium. In this study, we propose a solid-liquid/solid-gas (solid precursor and liquid/vapor Se) synergistic reaction strategy to precisely control the selenization process. By pre-depositing excess liquid selenium, we provide the high chemical potential of selenium to facilitate the direct and rapid formation of the Kesterite phase. The further optimization of selenium condensation and subsequent volatilization enables the efficient removal of organic compounds and thus improves charge transport in the absorber film. As a result, we achieve high-performance Kesterite solar cells with total-area efficiency of 13.6% (certified at 13.44%) and 1.09 cm2-area efficiency of 12.0% (certified at 12.1%).

Suggested Citation

  • Xiao Xu & Jiazheng Zhou & Kang Yin & Jinlin Wang & Licheng Lou & Menghan Jiao & Bowen Zhang & Dongmei Li & Jiangjian Shi & Huijue Wu & Yanhong Luo & Qingbo Meng, 2023. "Controlling Selenization Equilibrium Enables High-Quality Kesterite Absorbers for Efficient Solar Cells," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42460-7
    DOI: 10.1038/s41467-023-42460-7
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    References listed on IDEAS

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    1. Jianjun Li & Jialiang Huang & Fajun Ma & Heng Sun & Jialin Cong & Karen Privat & Richard F. Webster & Soshan Cheong & Yin Yao & Robert Lee Chin & Xiaojie Yuan & Mingrui He & Kaiwen Sun & Hui Li & Yaoh, 2022. "Unveiling microscopic carrier loss mechanisms in 12% efficient Cu2ZnSnSe4 solar cells," Nature Energy, Nature, vol. 7(8), pages 754-764, August.
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