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Photoconductivity of Bulk-Film-Based Graphene Sheets

Authors

  • Xin Lv,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Yi Huang,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Zhibo Liu,

    1. Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education Teda Applied Physics School, Nankai University Tianjin 300071 (China)
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  • Jianguo Tian,

    1. Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education Teda Applied Physics School, Nankai University Tianjin 300071 (China)
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  • Yan Wang,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Yanfeng Ma,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Jiajie Liang,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Shipeng Fu,

    1. Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education Teda Applied Physics School, Nankai University Tianjin 300071 (China)
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  • Xiangjian Wan,

    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
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  • Yongsheng Chen

    Corresponding author
    1. Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China)
    • Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology Institute of Polymer Chemistry, College of Chemistry, Nankai University Tianjin, 300071 (China).
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Abstract

Time-resolved photoconductivity measurements are carried out on graphene films prepared by using soluble graphene oxide. High photocurrent generation efficiency is observed for these graphene-based films, and the relationships between their photoconductivity and different preparation methods, incident light intensity, external electric field, and photon energies are investigated. Higher photoconductivity is observed with higher photon energy at same incident light intensity. By fitting the experimental data to the Onsager model, the primary quantum yields for charge separation to generate bound electron–hole pairs and the initial ion-pair thermalization separation distance are calculated.

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