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Mastering morphology of non-fullerene acceptors towards long-term stable organic solar cells

Author

Listed:
  • Kang An

    (South China University of Technology)

  • Wenkai Zhong

    (South China University of Technology
    Shanghai Jiao Tong University)

  • Feng Peng

    (South China Institute of Collaborative Innovation)

  • Wanyuan Deng

    (South China University of Technology)

  • Ying Shang

    (South China University of Technology
    Pazhou Lab)

  • Huilei Quan

    (South China University of Technology)

  • Hong Qiu

    (South China University of Technology)

  • Cheng Wang

    (Advanced Light Source Lawrence Berkeley National Laboratory)

  • Feng Liu

    (Shanghai Jiao Tong University)

  • Hongbin Wu

    (South China University of Technology)

  • Ning Li

    (South China University of Technology
    Pazhou Lab)

  • Fei Huang

    (South China University of Technology
    Pazhou Lab)

  • Lei Ying

    (South China University of Technology)

Abstract

Despite the rapid progress of organic solar cells based on non-fullerene acceptors, simultaneously achieving high power conversion efficiency and long-term stability for commercialization requires sustainable research effort. Here, we demonstrate stable devices by integrating a wide bandgap electron-donating polymer (namely PTzBI-dF) and two acceptors (namely L8BO and Y6) that feature similar structures yet different thermal and morphological properties. The organic solar cell based on PTzBI-dF:L8BO:Y6 could achieve a promising efficiency of 18.26% in the conventional device structure. In the inverted structure, excellent long-term thermal stability over 1400 h under 85 °C continuous heating is obtained. The improved performance can be ascribed to suppressed charge recombination along with appropriate charge transport. We find that the morphological features in terms of crystalline coherence length of fresh and aged films can be gradually regulated by the weight ratio of L8BO:Y6. Additionally, the occurrence of melting point decrease and reduced enthalpy in PTzBI-dF:L8BO:Y6 films could prohibit the amorphous phase to cluster, and consequently overcome the energetic traps accumulation aroused by thermal stress, which is a critical issue in high efficiency non-fullerene acceptors-based devices. This work provides insight into understanding non-fullerene acceptors-based organic solar cells for improved efficiency and stability.

Suggested Citation

  • Kang An & Wenkai Zhong & Feng Peng & Wanyuan Deng & Ying Shang & Huilei Quan & Hong Qiu & Cheng Wang & Feng Liu & Hongbin Wu & Ning Li & Fei Huang & Lei Ying, 2023. "Mastering morphology of non-fullerene acceptors towards long-term stable organic solar cells," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38306-x
    DOI: 10.1038/s41467-023-38306-x
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    References listed on IDEAS

    as
    1. Ning Li & Christoph J. Brabec, 2017. "Washing away barriers," Nature Energy, Nature, vol. 2(10), pages 772-773, October.
    2. 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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    2. Caixuan Wang & Xiaoming Ma & Dan Deng & Hao Zhang & Rui Sun & Jianqi Zhang & Lili Zhang & Mengying Wu & Jie Min & Zhi-Guo Zhang & Zhixiang Wei, 2024. "Giant dimeric donors for all-giant-oligomer organic solar cells with efficiency over 16% and superior photostability," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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