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Enhanced charge carrier transport and defects mitigation of passivation layer for efficient perovskite solar cells

Author

Listed:
  • Zihan Qu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yang Zhao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Liaoning University)

  • Fei Ma

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Le Mei

    (City University of Hong Kong
    Soochow University
    Soochow University)

  • Xian-Kai Chen

    (Soochow University
    Soochow University)

  • Haitao Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xinbo Chu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yingguo Yang

    (Chinese Academy of Sciences
    Fudan University)

  • Qi Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xingwang Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jingbi You

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Surface passivation has been developed as an effective strategy to reduce trap-state density and suppress non-radiation recombination process in perovskite solar cells. However, passivation agents usually own poor conductivity and hold negative impact on the charge carrier transport in device. Here, we report a binary and synergistical post-treatment method by blending 4-tert-butyl-benzylammonium iodide with phenylpropylammonium iodide and spin-coating on perovskite surface to form passivation layer. The binary and synergistical post-treated films show enhanced crystallinity and improved molecular packing as well as better energy band alignment, benefiting for the hole extraction and transfer. Moreover, the surface defects are further passivated compared with unary passivation. Based on the strategy, a record-certified quasi-steady power conversion efficiency of 26.0% perovskite solar cells is achieved. The devices could maintain 81% of initial efficiency after 450 h maximum power point tracking.

Suggested Citation

  • Zihan Qu & Yang Zhao & Fei Ma & Le Mei & Xian-Kai Chen & Haitao Zhou & Xinbo Chu & Yingguo Yang & Qi Jiang & Xingwang Zhang & Jingbi You, 2024. "Enhanced charge carrier transport and defects mitigation of passivation layer for efficient perovskite solar cells," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52925-y
    DOI: 10.1038/s41467-024-52925-y
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    References listed on IDEAS

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