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A chemically inert bismuth interlayer enhances long-term stability of inverted perovskite solar cells

Author

Listed:
  • Shaohang Wu

    (Huazhong University of Science and Technology)

  • Rui Chen

    (Huazhong University of Science and Technology)

  • Shasha Zhang

    (Huazhong University of Science and Technology)

  • B. Hari Babu

    (Chinese Academy of Sciences)

  • Youfeng Yue

    (National Institute of Advanced Industrial Science and Technology (AIST))

  • Hongmei Zhu

    (Huazhong University of Science and Technology)

  • Zhichun Yang

    (Huazhong University of Science and Technology)

  • Chuanliang Chen

    (Huazhong University of Science and Technology)

  • Weitao Chen

    (Huazhong University of Science and Technology)

  • Yuqian Huang

    (Huazhong University of Science and Technology)

  • Shaoying Fang

    (Huazhong University of Science and Technology)

  • Tianlun Liu

    (Huazhong University of Science and Technology)

  • Liyuan Han

    (Shanghai Jiao Tong University)

  • Wei Chen

    (Huazhong University of Science and Technology
    Chinese Academy of Sciences)

Abstract

Long-term stability remains a key issue impeding the commercialization of halide perovskite solar cells (HPVKSCs). The diffusion of molecules and ions causes irreversible degradation to photovoltaic device performance. Here, we demonstrate a facile strategy for producing highly stable HPVKSCs by using a thin but compact semimetal Bismuth interlayer. The Bismuth film acts as a robust permeation barrier that both insulates the perovskite from intrusion by undesirable external moisture and protects the metal electrode from iodine corrosion. The Bismuth-interlayer-based devices exhibit greatly improved stability when subjected to humidity, thermal and light stresses. The unencapsulated device retains 88% of its initial efficiency in ambient air in the dark for over 6000 h; the devices maintain 95% and 97% of their initial efficiencies after 85 °C thermal aging and light soaking in nitrogen atmosphere for 500 h, respectively. These sound stability parameters are among the best for planar structured HPVKSCs reported to date.

Suggested Citation

  • Shaohang Wu & Rui Chen & Shasha Zhang & B. Hari Babu & Youfeng Yue & Hongmei Zhu & Zhichun Yang & Chuanliang Chen & Weitao Chen & Yuqian Huang & Shaoying Fang & Tianlun Liu & Liyuan Han & Wei Chen, 2019. "A chemically inert bismuth interlayer enhances long-term stability of inverted perovskite solar cells," Nature Communications, Nature, vol. 10(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09167-0
    DOI: 10.1038/s41467-019-09167-0
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    Cited by:

    1. Cheng Gong & Haiyun Li & Huaxin Wang & Cong Zhang & Qixin Zhuang & Awen Wang & Zhiyuan Xu & Wensi Cai & Ru Li & Xiong Li & Zhigang Zang, 2024. "Silver coordination-induced n-doping of PCBM for stable and efficient inverted perovskite solar cells," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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