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Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20%

Author

Listed:
  • Chen Chen

    (Wuhan University of Technology)

  • Liang Wang

    (Wuhan University of Technology)

  • Weiyi Xia

    (Wuhan University of Technology)

  • Ke Qiu

    (Wuhan University of Technology)

  • Chuanhang Guo

    (Wuhan University of Technology)

  • Zirui Gan

    (Wuhan University of Technology)

  • Jing Zhou

    (Wuhan University of Technology)

  • Yuandong Sun

    (Wuhan University of Technology)

  • Dan Liu

    (Wuhan University of Technology)

  • Wei Li

    (Wuhan University of Technology)

  • Tao Wang

    (Wuhan University of Technology
    Wuhan University of Technology)

Abstract

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways for effective charge transport, is a promising morphology for high performance organic solar cells. Here, we synthesize a thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor and host acceptor, that surpasses the 20% efficiency milestone of organic solar cells. After adding L8-ThCl, the original weak and less continuous nanofibrils of polymer donors, i.e. PM6 or D18, are well enlarged and refined, whilst the host acceptor L8-BO also assembles into nanofibrils with enhanced structural order. By adapting the layer-by-layer deposition method, the enhanced structural order can be retained to significantly boost the power conversion efficiency, with specific values of 19.4% and 20.1% for the PM6:L8-ThCl/L8-BO:L8-ThCl and D18:L8-ThCl/L8-BO:L8-ThCl devices, with the latter being certified 20.0%, which is the highest certified efficiency reported so far for single-junction organic solar cells.

Suggested Citation

  • Chen Chen & Liang Wang & Weiyi Xia & Ke Qiu & Chuanhang Guo & Zirui Gan & Jing Zhou & Yuandong Sun & Dan Liu & Wei Li & Tao Wang, 2024. "Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20%," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51359-w
    DOI: 10.1038/s41467-024-51359-w
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