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Concretized structural evolution supported assembly-controlled film-forming kinetics in slot-die coated organic photovoltaics

Author

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  • Hao Zhang

    (National Center for Nanoscience and Technology
    University of Chinese Academy of Sciences)

  • Chenyang Tian

    (National Center for Nanoscience and Technology
    University of Chinese Academy of Sciences)

  • Ziqi Zhang

    (National Center for Nanoscience and Technology
    University of Chinese Academy of Sciences)

  • Meiling Xie

    (National Center for Nanoscience and Technology
    University of Chinese Academy of Sciences)

  • Jianqi Zhang

    (National Center for Nanoscience and Technology)

  • Lingyun Zhu

    (National Center for Nanoscience and Technology)

  • Zhixiang Wei

    (National Center for Nanoscience and Technology
    University of Chinese Academy of Sciences)

Abstract

Bulk-heterojunction structured small-area organic solar cells are approaching 20% power conversion efficiency, but the blurred film-forming kinetics in the fabrication of large-area devices causes significant PCE loss and restrains the potential of commercialization. Such blurring came from insufficient knowledge of structural evolution during the film-forming process. Here, we concretize the evolution process with structures detailed to the submolecular level by comprehensive investigations of in-situ UV-vis spectroscopy, Atomic Force Microscope, Grazing Incident Wide Angle X-ray Scattering, and molecular dynamic simulation. With such hierarchical structural knowledge, assembly-controlled film-forming kinetics is proposed to explain the whole picture. Such assembly is determined by molecule configuration and can be tuned via external conditions. Understanding this kinetics will contribute to screening large-area device fabrication conditions, and the detailed structural knowledge could inspire the future design of novel photovoltaic materials that are intrinsically excellent in large-area device fabrications.

Suggested Citation

  • Hao Zhang & Chenyang Tian & Ziqi Zhang & Meiling Xie & Jianqi Zhang & Lingyun Zhu & Zhixiang Wei, 2023. "Concretized structural evolution supported assembly-controlled film-forming kinetics in slot-die coated organic photovoltaics," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42018-7
    DOI: 10.1038/s41467-023-42018-7
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