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Prediction of sub-pyramid texturing as the next step towards high efficiency silicon heterojunction solar cells

Author

Listed:
  • Feihong Chu

    (Beijing University of Technology)

  • Xianlin Qu

    (Nanjing University of Aeronautics and Astronautics)

  • Yongcai He

    (Beijing University of Technology
    LONGi Central R&D Institute)

  • Wenling Li

    (Beijing University of Technology)

  • Xiaoqing Chen

    (Beijing University of Technology)

  • Zilong Zheng

    (Beijing University of Technology)

  • Miao Yang

    (LONGi Central R&D Institute)

  • Xiaoning Ru

    (LONGi Central R&D Institute)

  • Fuguo Peng

    (LONGi Central R&D Institute)

  • Minghao Qu

    (LONGi Central R&D Institute)

  • Kun Zheng

    (Beijing University of Technology)

  • Xixiang Xu

    (LONGi Central R&D Institute)

  • Hui Yan

    (Beijing University of Technology)

  • Yongzhe Zhang

    (Beijing University of Technology)

Abstract

The interfacial morphology of crystalline silicon/hydrogenated amorphous silicon (c-Si/a-Si:H) is a key success factor to approach the theoretical efficiency of Si-based solar cells, especially Si heterojunction technology. The unexpected crystalline silicon epitaxial growth and interfacial nanotwins formation remain a challenging issue for silicon heterojunction technology. Here, we design a hybrid interface by tuning pyramid apex-angle to improve c-Si/a-Si:H interfacial morphology in silicon solar cells. The pyramid apex-angle (slightly smaller than 70.53°) consists of hybrid (111)0.9/(011)0.1 c-Si planes, rather than pure (111) planes in conventional texture pyramid. Employing microsecond-long low-temperature (500 K) molecular dynamic simulations, the hybrid (111)/(011) plane prevents from both c-Si epitaxial growth and nanotwin formation. More importantly, given there is not any additional industrial preparation process, the hybrid c-Si plane could improve c-Si/a-Si:H interfacial morphology for a-Si passivated contacts technique, and wide-applied for all silicon-based solar cells as well.

Suggested Citation

  • Feihong Chu & Xianlin Qu & Yongcai He & Wenling Li & Xiaoqing Chen & Zilong Zheng & Miao Yang & Xiaoning Ru & Fuguo Peng & Minghao Qu & Kun Zheng & Xixiang Xu & Hui Yan & Yongzhe Zhang, 2023. "Prediction of sub-pyramid texturing as the next step towards high efficiency silicon heterojunction solar cells," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39342-3
    DOI: 10.1038/s41467-023-39342-3
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    References listed on IDEAS

    as
    1. Xianlin Qu & Yongcai He & Minghao Qu & Tianyu Ruan & Feihong Chu & Zilong Zheng & Yabin Ma & Yuanping Chen & Xiaoning Ru & Xixiang Xu & Hui Yan & Lihua Wang & Yongzhe Zhang & Xiaojing Hao & Ziv Hameir, 2021. "Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells," Nature Energy, Nature, vol. 6(2), pages 194-202, February.
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