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Charge Transfer and Current Fluctuations in Single Layer Graphene Transistors Modified by Self-Assembled C60 Adlayers

Authors

  • Rui Wang,

    1. Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China
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  • Shengnan Wang,

    1. Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China
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  • Xiaowei Wang,

    1. Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China
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  • Jakob A. S. Meyer,

    1. Nano-Science Center and Niels Bohr Institute, University of Copenhagen, Universitetsparken, 5, 2100 Copenhagen, Denmark
    2. Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Science, Beijing, 100049, PR China
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  • Per Hedegård,

    1. Nano-Science Center and Niels Bohr Institute, University of Copenhagen, Universitetsparken, 5, 2100 Copenhagen, Denmark
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  • Bo W. Laursen,

    1. Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken, 5, 2100 Copenhagen, Denmark
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  • Zhihai Cheng,

    1. Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China
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  • Xiaohui Qiu

    Corresponding author
    1. Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China
    • Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China.
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Abstract

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Flicker noise in a “fullerene + graphene” hybrid transistor is investigated to reveal the electrical coupling between the graphene channel and C60 adsorbates. The charge trapping and detrapping events at the C60/graphene interface induce current fluctuations in the devices. The evolution of noise characteristics at varying temperatures indicates the different contributions related to Coulomb scattering and charge exchange kinetics.

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