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A unified description of non-radiative voltage losses in organic solar cells

Author

Listed:
  • Xian-Kai Chen

    (The University of Arizona)

  • Deping Qian

    (Linköping University)

  • Yuming Wang

    (Linköping University)

  • Thomas Kirchartz

    (IEK5-Photovoltaik, Forschungszentrum Jülich
    University of Duisburg-Essen)

  • Wolfgang Tress

    (Zurich University of Applied Sciences)

  • Huifeng Yao

    (Chinese Academy of Sciences)

  • Jun Yuan

    (Linköping University
    Central South University)

  • Markus Hülsbeck

    (IEK5-Photovoltaik, Forschungszentrum Jülich)

  • Maojie Zhang

    (Soochow University)

  • Yingping Zou

    (Central South University)

  • Yanming Sun

    (Beihang University)

  • Yongfang Li

    (Chinese Academy of Sciences
    Soochow University)

  • Jianhui Hou

    (Chinese Academy of Sciences)

  • Olle Inganäs

    (Linköping University)

  • Veaceslav Coropceanu

    (The University of Arizona)

  • Jean-Luc Bredas

    (The University of Arizona)

  • Feng Gao

    (Linköping University)

Abstract

Recent advances in organic solar cells based on non-fullerene acceptors (NFAs) come with reduced non-radiative voltage losses (ΔVnr). Here we show that, in contrast to the energy-gap-law dependence observed in conventional donor:fullerene blends, the ΔVnr values in state-of-the-art donor:NFA organic solar cells show no correlation with the energies of charge-transfer electronic states at donor:acceptor interfaces. By combining temperature-dependent electroluminescence experiments and dynamic vibronic simulations, we provide a unified description of ΔVnr for both fullerene- and NFA-based devices. We highlight the critical role that the thermal population of local exciton states plays in low-ΔVnr systems. An important finding is that the photoluminescence yield of the pristine materials defines the lower limit of ΔVnr. We also demonstrate that the reduction in ΔVnr (for example,

Suggested Citation

  • Xian-Kai Chen & Deping Qian & Yuming Wang & Thomas Kirchartz & Wolfgang Tress & Huifeng Yao & Jun Yuan & Markus Hülsbeck & Maojie Zhang & Yingping Zou & Yanming Sun & Yongfang Li & Jianhui Hou & Olle , 2021. "A unified description of non-radiative voltage losses in organic solar cells," Nature Energy, Nature, vol. 6(8), pages 799-806, August.
    • Handle: RePEc:nat:natene:v:6:y:2021:i:8:d:10.1038_s41560-021-00843-4
    DOI: 10.1038/s41560-021-00843-4
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    Cited by:

    1. Yuming Wang & Jianwei Yu & Rui Zhang & Jun Yuan & Sandra Hultmark & Catherine E. Johnson & Nathaniel P. Gallop & Bernhard Siegmund & Deping Qian & Huotian Zhang & Yingping Zou & Martijn Kemerink & Art, 2023. "Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses," Nature Energy, Nature, vol. 8(9), pages 978-988, September.

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