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Regulating strain in perovskite thin films through charge-transport layers

Author

Listed:
  • Ding-Jiang Xue

    (University of Toronto
    Chinese Academy of Sciences)

  • Yi Hou

    (University of Toronto)

  • Shun-Chang Liu

    (Chinese Academy of Sciences)

  • Mingyang Wei

    (University of Toronto)

  • Bin Chen

    (University of Toronto)

  • Ziru Huang

    (University of Toronto)

  • Zongbao Li

    (Chinese Academy of Sciences
    Zhengzhou University)

  • Bin Sun

    (University of Toronto)

  • Andrew H. Proppe

    (University of Toronto
    University of Toronto)

  • Yitong Dong

    (University of Toronto)

  • Makhsud I. Saidaminov

    (University of Toronto)

  • Shana O. Kelley

    (University of Toronto
    University of Toronto)

  • Jin-Song Hu

    (Chinese Academy of Sciences)

  • Edward H. Sargent

    (University of Toronto)

Abstract

Thermally-induced tensile strain that remains in perovskite films following annealing results in increased ion migration and is a known factor in the instability of these materials. Previously-reported strain regulation methods for perovskite solar cells (PSCs) have utilized substrates with high thermal expansion coefficients that limits the processing temperature of perovskites and compromises power conversion efficiency. Here we compensate residual tensile strain by introducing an external compressive strain from the hole-transport layer. By using a hole-transport layer with high thermal expansion coefficient, we compensate the tensile strain in PSCs by elevating the processing temperature of hole-transport layer. We find that compressive strain increases the activation energy for ion migration, improving the stability of perovskite films. We achieve an efficiency of 16.4% for compressively-strained PSCs; and these retain 96% of their initial efficiencies after heating at 85 °C for 1000 hours—the most stable wide-bandgap perovskites (above 1.75 eV) reported so far.

Suggested Citation

  • Ding-Jiang Xue & Yi Hou & Shun-Chang Liu & Mingyang Wei & Bin Chen & Ziru Huang & Zongbao Li & Bin Sun & Andrew H. Proppe & Yitong Dong & Makhsud I. Saidaminov & Shana O. Kelley & Jin-Song Hu & Edward, 2020. "Regulating strain in perovskite thin films through charge-transport layers," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15338-1
    DOI: 10.1038/s41467-020-15338-1
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    Cited by:

    1. Xinlong Wang & Zhiqin Ying & Jingming Zheng & Xin Li & Zhipeng Zhang & Chuanxiao Xiao & Ying Chen & Ming Wu & Zhenhai Yang & Jingsong Sun & Jia-Ru Xu & Jiang Sheng & Yuheng Zeng & Xi Yang & Guichuan X, 2023. "Long-chain anionic surfactants enabling stable perovskite/silicon tandems with greatly suppressed stress corrosion," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Dmitry Lapkin & Christopher Kirsch & Jonas Hiller & Denis Andrienko & Dameli Assalauova & Kai Braun & Jerome Carnis & Young Yong Kim & Mukunda Mandal & Andre Maier & Alfred J. Meixner & Nastasia Mukha, 2022. "Spatially resolved fluorescence of caesium lead halide perovskite supercrystals reveals quasi-atomic behavior of nanocrystals," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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