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Broadband high photoresponse from pure monolayer graphene photodetector

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  • By Yongzhe Zhang

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University
    Present address: School of Renewable Energy and State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China)

  • Tao Liu

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University)

  • Bo Meng

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University)

  • Xiaohui Li

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University)

  • Guozhen Liang

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University)

  • Xiaonan Hu

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University)

  • Qi Jie Wang

    (School of Electrical and Electronic Engineering, 50 Nanyang Avenue, Nanyang Technological University
    School of Physical and Mathematical Sciences, Nanyang Technological University
    Centre for Disruptive Photonic Technologies, Nanyang Technological University)

Abstract

Graphene has attracted large interest in photonic applications owing to its promising optical properties, especially its ability to absorb light over a broad wavelength range, which has lead to several studies on pure monolayer graphene-based photodetectors. However, the maximum responsivity of these photodetectors is below 10 mA W−1, which significantly limits their potential for applications. Here we report high photoresponsivity (with high photoconductive gain) of 8.61 A W−1 in pure monolayer graphene photodetectors, about three orders of magnitude higher than those reported in the literature, by introducing electron trapping centres and by creating a bandgap in graphene through band structure engineering. In addition, broadband photoresponse with high photoresponsivity from the visible to the mid-infrared is experimentally demonstrated. To the best of our knowledge, this work demonstrates the broadest photoresponse with high photoresponsivity from pure monolayer graphene photodetectors, proving the potential of graphene as a promising material for efficient optoelectronic devices.

Suggested Citation

  • By Yongzhe Zhang & Tao Liu & Bo Meng & Xiaohui Li & Guozhen Liang & Xiaonan Hu & Qi Jie Wang, 2013. "Broadband high photoresponse from pure monolayer graphene photodetector," Nature Communications, Nature, vol. 4(1), pages 1-11, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2830
    DOI: 10.1038/ncomms2830
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    Cited by:

    1. Mingjin Dai & Chongwu Wang & Bo Qiang & Yuhao Jin & Ming Ye & Fakun Wang & Fangyuan Sun & Xuran Zhang & Yu Luo & Qi Jie Wang, 2023. "Long-wave infrared photothermoelectric detectors with ultrahigh polarization sensitivity," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Hao Jiang & Jintao Fu & Jingxuan Wei & Shaojuan Li & Changbin Nie & Feiying Sun & Qing Yang Steve Wu & Mingxiu Liu & Zhaogang Dong & Xingzhan Wei & Weibo Gao & Cheng-Wei Qiu, 2024. "Synergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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