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Regulating wide-bandgap perovskite face-on stacking in hybrid-deposited perovskite/organic tandem solar cells

Author

Listed:
  • Yu-Duan Wang

    (National University of Singapore
    National University of Singapore)

  • Zhenrong Jia

    (National University of Singapore
    National University of Singapore)

  • Shunchang Liu

    (National University of Singapore)

  • Ran Luo

    (National University of Singapore
    National University of Singapore)

  • Yuchen Zhang

    (Syracuse University)

  • Julian A. Steele

    (St Lucia
    The University of Queensland)

  • Zachary Degnan

    (The University of Queensland)

  • M. Bilal Faheem

    (Syracuse University)

  • Eduardo Solano

    (Cerdanyola del Vallés)

  • Quinn Qiao

    (Syracuse University)

  • Jia Li

    (National University of Singapore)

  • Zhuojie Shi

    (National University of Singapore
    National University of Singapore)

  • Ling Kai Lee

    (National University of Singapore)

  • Xiao Guo

    (National University of Singapore
    National University of Singapore)

  • Zijing Dong

    (National University of Singapore
    National University of Singapore)

  • Xi Wang

    (National University of Singapore
    National University of Singapore)

  • Jinxi Chen

    (National University of Singapore
    National University of Singapore)

  • Nengxu Li

    (National University of Singapore
    National University of Singapore)

  • Qilin Zhou

    (National University of Singapore
    National University of Singapore)

  • Zhouyin Wei

    (National University of Singapore)

  • Xinyi Du

    (National University of Singapore
    National University of Singapore)

  • Yi Hou

    (National University of Singapore
    National University of Singapore)

Abstract

Vacuum-assisted hybrid deposition for wide-bandgap (WBG) perovskites has been widely recognized for its advantages, including convenience for scaling up and conformal growth, while avoiding toxic solvents. However, the growth of WBG perovskites (>1.8 eV), which is critical for advancing the performance of thin-film-based tandem solar cells, remains insufficiently controlled under hybrid deposition. In this work, we introduce n-propylamine hydrochloride (PACl), which shows enhanced face-on stacking of (100) plane, effectively regulating the oriented crystal growth of 1.84 eV WBG perovskites during the annealing process. This approach reduces defect density and, consequently, improves carrier diffusion length. As a result, the hybrid-deposited WBG perovskite (>1.8 eV) solar cells realize a maximum efficiency of 17.48% and an open-circuit voltage (Voc) exceeding 1.315 V. When integrated with organic sub-cell in a two-terminal tandem configuration, the tandem device demonstrates a record efficiency of 26.46%, with a certified efficiency of 25.82% over an active area of 0.05 cm2.

Suggested Citation

  • Yu-Duan Wang & Zhenrong Jia & Shunchang Liu & Ran Luo & Yuchen Zhang & Julian A. Steele & Zachary Degnan & M. Bilal Faheem & Eduardo Solano & Quinn Qiao & Jia Li & Zhuojie Shi & Ling Kai Lee & Xiao Gu, 2025. "Regulating wide-bandgap perovskite face-on stacking in hybrid-deposited perovskite/organic tandem solar cells," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-61404-x
    DOI: 10.1038/s41467-025-61404-x
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