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Ultra-Broadband Photodetector for the Visible to Terahertz Range by Self-Assembling Reduced Graphene Oxide-Silicon Nanowire Array Heterojunctions

Authors

  • Yang Cao,

    1. Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Haidianqu, Beijing, China
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  • Jiayi Zhu,

    1. Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Haidianqu, Beijing, China
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  • Jia Xu,

    1. Beijing Key Laboratory of Low-grade Energy Multiphase Flow and Heat Transfer, School of Renewable Energy, North China Electric Power University, Beijing, China
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  • Junhui He,

    Corresponding author
    1. Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Haidianqu, Beijing, China
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  • Jia-Lin Sun,

    Corresponding author
    1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China
    2. Collaborative Innovation Center of Quantum Matter, Beijing, China
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  • Yingxin Wang,

    1. Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing, China
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  • Ziran Zhao

    1. Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing, China
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Abstract

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Advantages of reduced graphene oxide (RGO) and Si nanowire (SiNW) array are integrated into a single photodetector by simple drop-casting of the suspension of graphene oxide (GO) nanosheets on top of the SiNW array followed by heat-treatment. The RGO-SiNW array heterojunction photodetector is photoresponsive to the visible, near-infrared, mid-infrared, and terahertz wave irradiations at room temperature.

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