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In-situ self-assembly of hole transport monolayer during crystallization for efficient single-crystal perovskite solar cells

Author

Listed:
  • Vishal Yeddu

    (University of Victoria)

  • Khulud Almasabi

    (King Abdullah University of Science and Technology (KAUST))

  • Yafeng Xu

    (King Abdullah University of Science and Technology (KAUST))

  • Augusto Amaro

    (University of Victoria)

  • Shuang Qiu

    (University of Victoria)

  • Sergey Dayneko

    (University of Victoria)

  • Dongyang Zhang

    (University of Victoria)

  • Parinaz Moazzezi

    (University of Victoria)

  • Christopher Tremblay

    (University of Victoria
    University of Victoria)

  • Muhammad Naufal Lintangpradipto

    (King Abdullah University of Science and Technology (KAUST))

  • Heather L. Buckley

    (University of Victoria
    University of Victoria
    University of Victoria)

  • Omar F. Mohammed

    (King Abdullah University of Science and Technology (KAUST))

  • Osman M. Bakr

    (King Abdullah University of Science and Technology (KAUST))

  • Makhsud I. Saidaminov

    (University of Victoria
    University of Victoria
    University of Victoria)

Abstract

Single-crystal perovskite solar cells (SC-PSCs) are emerging as a promising technology owing to their intrinsically low defect densities, long carrier diffusion lengths, and enhanced stability compared to their polycrystalline counterpart. However, their performance has been limited by interface-related losses, particularly at the perovskite/charge transport layer, which hinders effective hole extraction and promotes non-radiative recombination. In this work, we introduce a self-assembled monolayer (SAM) deposition strategy that exploits an asymmetric substrate stack configuration during space-confined inverse temperature crystallization (SC-ITC). This configuration triggers an in-situ migration of SAM molecules from the SAM-coated substrate to the uncoated substrate, resulting in a denser and more homogeneous SAM coating than the conventional spin-coating method can achieve. The improved SAM coverage significantly enhances hole extraction. Consequently, our SC-PSCs achieved power conversion efficiency as high as 24.32%.

Suggested Citation

  • Vishal Yeddu & Khulud Almasabi & Yafeng Xu & Augusto Amaro & Shuang Qiu & Sergey Dayneko & Dongyang Zhang & Parinaz Moazzezi & Christopher Tremblay & Muhammad Naufal Lintangpradipto & Heather L. Buckl, 2025. "In-situ self-assembly of hole transport monolayer during crystallization for efficient single-crystal perovskite solar cells," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62393-7
    DOI: 10.1038/s41467-025-62393-7
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    References listed on IDEAS

    as
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