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Hexanary blends: a strategy towards thermally stable organic photovoltaics

Author

Listed:
  • Sri Harish Kumar Paleti

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Sandra Hultmark

    (Chalmers University of Technology)

  • Jianhua Han

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Yuanfan Wen

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Han Xu

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Si Chen

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Emmy Järsvall

    (Chalmers University of Technology)

  • Ishita Jalan

    (Karlstad University)

  • Diego Rosas Villalva

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Anirudh Sharma

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Jafar. I. Khan

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Ellen Moons

    (Karlstad University)

  • Ruipeng Li

    (National Synchrotron Light Source II, Brookhaven National Lab)

  • Liyang Yu

    (Sichuan University)

  • Julien Gorenflot

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Frédéric Laquai

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

  • Christian Müller

    (Chalmers University of Technology)

  • Derya Baran

    (King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division (PSE), KAUST Solar Center (KSC))

Abstract

Non-fullerene based organic solar cells display a high initial power conversion efficiency but continue to suffer from poor thermal stability, especially in case of devices with thick active layers. Mixing of five structurally similar acceptors with similar electron affinities, and blending with a donor polymer is explored, yielding devices with a power conversion efficiency of up to 17.6%. The hexanary device performance is unaffected by thermal annealing of the bulk-heterojunction active layer for at least 23 days at 130 °C in the dark and an inert atmosphere. Moreover, hexanary blends offer a high degree of thermal stability for an active layer thickness of up to 390 nm, which is advantageous for high-throughput processing of organic solar cells. Here, a generic strategy based on multi-component acceptor mixtures is presented that permits to considerably improve the thermal stability of non-fullerene based devices and thus paves the way for large-area organic solar cells.

Suggested Citation

  • Sri Harish Kumar Paleti & Sandra Hultmark & Jianhua Han & Yuanfan Wen & Han Xu & Si Chen & Emmy Järsvall & Ishita Jalan & Diego Rosas Villalva & Anirudh Sharma & Jafar. I. Khan & Ellen Moons & Ruipeng, 2023. "Hexanary blends: a strategy towards thermally stable organic photovoltaics," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39830-6
    DOI: 10.1038/s41467-023-39830-6
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    1. Chao Li & Jiadong Zhou & Jiali Song & Jinqiu Xu & Huotian Zhang & Xuning Zhang & Jing Guo & Lei Zhu & Donghui Wei & Guangchao Han & Jie Min & Yuan Zhang & Zengqi Xie & Yuanping Yi & He Yan & Feng Gao , 2021. "Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells," Nature Energy, Nature, vol. 6(6), pages 605-613, June.
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