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Homogeneous coverage of the low-dimensional perovskite passivation layer for formamidinium–caesium perovskite solar modules

Author

Listed:
  • Jing Li

    (Wuhan University of Technology)

  • Chengkai Jin

    (Wuhan University of Technology)

  • Ruixuan Jiang

    (Wuhan University of Technology)

  • Jie Su

    (Xidian University)

  • Ting Tian

    (Technical University of Munich)

  • Chunyang Yin

    (University of Electronic Science and Technology of China)

  • Jiashen Meng

    (Wuhan University of Technology)

  • Zongkui Kou

    (Wuhan University of Technology)

  • Sai Bai

    (University of Electronic Science and Technology of China)

  • Peter Müller-Buschbaum

    (Technical University of Munich)

  • Fuzhi Huang

    (Wuhan University of Technology
    Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory)

  • Liqiang Mai

    (Wuhan University of Technology
    Wuhan University of Technology (Xiangyang Demonstration Zone))

  • Yi-Bing Cheng

    (Wuhan University of Technology
    Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory)

  • Tongle Bu

    (Wuhan University of Technology)

Abstract

The formation of a homogeneous passivation layer based on phase-pure two-dimensional (2D) perovskites is a challenge for perovskite solar cells, especially when upscaling the devices to modules. Here we reveal a chain-length-dependent and halide-related phase separation problem of 2D perovskite growing on top of three-dimensional perovskites. We demonstrate that a homogeneous 2D perovskite passivation layer can be formed upon treatment of the perovskite layer with formamidinium bromide in long-chain ( >10) alkylamine ligand salts. We achieve champion active-area efficiencies of 25.61%, 24.62% and 23.60% for antisolvent-free processed small- (0.14 cm2) and large-size (1.04 cm2) devices and mini-modules (13.44 cm2), respectively. This passivation strategy is compatible with printing technology, enabling champion aperture-area efficiencies of 18.90% and 17.59% for fully slot-die printed large solar modules with areas of 310 cm2 and 802 cm2, respectively, demonstrating the feasibility of the upscaling manufacturing.

Suggested Citation

  • Jing Li & Chengkai Jin & Ruixuan Jiang & Jie Su & Ting Tian & Chunyang Yin & Jiashen Meng & Zongkui Kou & Sai Bai & Peter Müller-Buschbaum & Fuzhi Huang & Liqiang Mai & Yi-Bing Cheng & Tongle Bu, 2024. "Homogeneous coverage of the low-dimensional perovskite passivation layer for formamidinium–caesium perovskite solar modules," Nature Energy, Nature, vol. 9(12), pages 1540-1550, December.
    • Handle: RePEc:nat:natene:v:9:y:2024:i:12:d:10.1038_s41560-024-01667-8
    DOI: 10.1038/s41560-024-01667-8
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