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Graded bulk-heterojunction enables 17% binary organic solar cells via nonhalogenated open air coating

Author

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  • Ying Zhang

    (The Hong Kong Polytechnic University)

  • Kuan Liu

    (The Hong Kong Polytechnic University)

  • Jiaming Huang

    (The Hong Kong Polytechnic University)

  • Xinxin Xia

    (The Chinese University of Hong Kong)

  • Jiupeng Cao

    (The Hong Kong Polytechnic University)

  • Guangming Zhao

    (The Hong Kong Polytechnic University)

  • Patrick W. K. Fong

    (The Hong Kong Polytechnic University)

  • Ye Zhu

    (The Hong Kong Polytechnic University)

  • Feng Yan

    (The Hong Kong Polytechnic University)

  • Yang Yang

    (UCLA)

  • Xinhui Lu

    (The Chinese University of Hong Kong)

  • Gang Li

    (The Hong Kong Polytechnic University)

Abstract

Graded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated G-BHJ OSCs deliver an outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence X-ray diffraction (GI-XRD) techniques enable the visualization of polymer/NFA composition and crystallinity gradient distributions, which benefit charge transport, and enable outstanding thick OSC PCEs (16.25% for 300 nm, 14.37% for 500 nm), which are among the highest reported. Moreover, the nonhalogenated solvent enabled G-BHJ OSC via open-air blade coating and achieved a record 16.77% PCE. The blade-coated G-BHJ has drastically different D-A crystallization kinetics, which suppresses the excessive aggregation induced unfavorable phase separation in BHJ. All these make G-BHJ a feasible and promising strategy towards highly efficient, eco- and manufacture friendly OSCs.

Suggested Citation

  • Ying Zhang & Kuan Liu & Jiaming Huang & Xinxin Xia & Jiupeng Cao & Guangming Zhao & Patrick W. K. Fong & Ye Zhu & Feng Yan & Yang Yang & Xinhui Lu & Gang Li, 2021. "Graded bulk-heterojunction enables 17% binary organic solar cells via nonhalogenated open air coating," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25148-8
    DOI: 10.1038/s41467-021-25148-8
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    Cited by:

    1. Daniel Corzo & Diego Rosas-Villalva & Amruth C & Guillermo Tostado-Blázquez & Emily Bezerra Alexandre & Luis Huerta Hernandez & Jianhua Han & Han Xu & Maxime Babics & Stefaan Wolf & Derya Baran, 2023. "High-performing organic electronics using terpene green solvents from renewable feedstocks," Nature Energy, Nature, vol. 8(1), pages 62-73, January.
    2. Siwei Luo & Chao Li & Jianquan Zhang & Xinhui Zou & Heng Zhao & Kan Ding & Hui Huang & Jiali Song & Jicheng Yi & Han Yu & Kam Sing Wong & Guangye Zhang & Harald Ade & Wei Ma & Huawei Hu & Yanming Sun , 2023. "Auxiliary sequential deposition enables 19%-efficiency organic solar cells processed from halogen-free solvents," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    3. Chee, A. Kuan-Way, 2023. "On current technology for light absorber materials used in highly efficient industrial solar cells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 173(C).
    4. Pengqing Bi & Tao Zhang & Yuanyuan Guo & Jianqiu Wang & Xian Wei Chua & Zhihao Chen & Wei Peng Goh & Changyun Jiang & Elbert E. M. Chia & Jianhui Hou & Le Yang, 2024. "Donor-acceptor bulk-heterojunction sensitizer for efficient solid-state infrared-to-visible photon up-conversion," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    5. Jiehao Fu & Patrick W. K. Fong & Heng Liu & Chieh-Szu Huang & Xinhui Lu & Shirong Lu & Maged Abdelsamie & Tim Kodalle & Carolin M. Sutter-Fella & Yang Yang & Gang Li, 2023. "19.31% binary organic solar cell and low non-radiative recombination enabled by non-monotonic intermediate state transition," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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