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A Transparent Electrode Based on Solution-Processed ZnO for Organic Optoelectronic Devices

Author

Listed:
  • Zhi Chen

    (Donghua University)

  • Jie Wang

    (Donghua University)

  • Hongbo Wu

    (Donghua University)

  • Jianming Yang

    (East China Normal University)

  • Yikai Wang

    (Changzhou University)

  • Jing Zhang

    (Changzhou University)

  • Qinye Bao

    (East China Normal University)

  • Ming Wang

    (Donghua University)

  • Zaifei Ma

    (Donghua University)

  • Wolfgang Tress

    (Zurich University of Applied Sciences)

  • Zheng Tang

    (Donghua University)

Abstract

Achieving high-efficiency indium tin oxide (ITO)-free organic optoelectronic devices requires the development of high-conductivity and high-transparency materials for being used as the front electrode. Herein, sol-gel-grown zinc oxide (ZnO) films with high conductivity (460 S cm−1) and low optical absorption losses in both visible and near-infrared (NIR) spectral regions are realized utilizing the persistent photoinduced doping effect. The origin of the increased conductivity after photo-doping is ascribed to selective trapping of photogenerated holes by oxygen vacancies at the surface of the ZnO film. Then, the conductivity of the sol-gel-grown ZnO is further increased by stacking the ZnO using a newly developed sequential deposition strategy. Finally, the stacked ZnO is used as the cathode to construct ITO-free organic solar cells, photodetectors, and light emitting diodes: The devices based on ZnO outperform those based on ITO, owing to the reduced surface recombination losses at the cathode/active layer interface, and the reduced parasitic absorption losses in the electrodes of the ZnO based devices.

Suggested Citation

  • Zhi Chen & Jie Wang & Hongbo Wu & Jianming Yang & Yikai Wang & Jing Zhang & Qinye Bao & Ming Wang & Zaifei Ma & Wolfgang Tress & Zheng Tang, 2022. "A Transparent Electrode Based on Solution-Processed ZnO for Organic Optoelectronic Devices," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32010-y
    DOI: 10.1038/s41467-022-32010-y
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    References listed on IDEAS

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    1. Thomas J. Penfold & Jakub Szlachetko & Fabio G. Santomauro & Alexander Britz & Wojciech Gawelda & Gilles Doumy & Anne Marie March & Stephen H. Southworth & Jochen Rittmann & Rafael Abela & Majed Cherg, 2018. "Revealing hole trapping in zinc oxide nanoparticles by time-resolved X-ray spectroscopy," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    2. K.O. Brinkmann & J. Zhao & N. Pourdavoud & T. Becker & T. Hu & S. Olthof & K. Meerholz & L. Hoffmann & T. Gahlmann & R. Heiderhoff & M. F. Oszajca & N. A. Luechinger & D. Rogalla & Y. Chen & B. Cheng , 2017. "Suppressed decomposition of organometal halide perovskites by impermeable electron-extraction layers in inverted solar cells," Nature Communications, Nature, vol. 8(1), pages 1-9, April.
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