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All-printable band-edge modulated ZnO nanowire photodetectors with ultra-high detectivity

Author

Listed:
  • Xi Liu

    (The Hong Kong University of Science and Technology)

  • Leilei Gu

    (The Hong Kong University of Science and Technology)

  • Qianpeng Zhang

    (The Hong Kong University of Science and Technology)

  • Jiyuan Wu

    (The Hong Kong University of Science and Technology)

  • Yunze Long

    (The Hong Kong University of Science and Technology
    Present address: College of Physics Science, Qingdao University, Qingdao 266071, China)

  • Zhiyong Fan

    (The Hong Kong University of Science and Technology)

Abstract

High-performance photodetectors are critical for high-speed optical communication and environmental sensing, and flexible photodetectors can be used for a wide range of portable or wearable applications. Here we demonstrate the all-printable fabrication of polycrystalline nanowire-based high-performance photodetectors on flexible substrates. Systematic investigations have shown their ultra-high photoconductive gain, responsivity and detectivity up to 3.3 × 1017 Jones. Further analysis shows that their high performance originates from the unique band-edge modulation along the nanowire axial direction, where the existence of Schottky barriers in series leads to highly suppressed dark current of the device and also gives rise to fast photoelectric response to low-intensity optical signal owing to barrier height modulation. The discovered rationale in this work can be utilized as guideline to design high-performance photodetectors with other nanomaterial systems. The developed fabrication scheme opens up possibility for future flexible and high-performance integrated optoelectronic sensor circuitry.

Suggested Citation

  • Xi Liu & Leilei Gu & Qianpeng Zhang & Jiyuan Wu & Yunze Long & Zhiyong Fan, 2014. "All-printable band-edge modulated ZnO nanowire photodetectors with ultra-high detectivity," Nature Communications, Nature, vol. 5(1), pages 1-9, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5007
    DOI: 10.1038/ncomms5007
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    Cited by:

    1. Sharifi, Farrokh & Ghobadian, Sasan & Cavalcanti, Flavia R. & Hashemi, Nastaran, 2015. "Paper-based devices for energy applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1453-1472.
    2. Chenhao Gao & Keyi Zhong & Xuan Fang & Dan Fang & Hongbin Zhao & Dengkui Wang & Bobo Li & Yingjiao Zhai & Xueying Chu & Jinhua Li & Xiaohua Wang, 2021. "Brief Review of Photocatalysis and Photoresponse Properties of ZnO–Graphene Nanocomposites," Energies, MDPI, vol. 14(19), pages 1-25, October.

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