Large Gain, Low Noise Nanocomposite Ultraviolet Photodetectors with a Linear Dynamic Range of 120 dB

Authors

  • Yanjun Fang,

    1. Department of Mechanical and Materials Engineering, Department of Electrical Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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  • Fawen Guo,

    1. Department of Mechanical and Materials Engineering, Department of Electrical Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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  • Zhengguo Xiao,

    1. Department of Mechanical and Materials Engineering, Department of Electrical Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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  • Jinsong Huang

    Corresponding author
    1. Department of Mechanical and Materials Engineering, Department of Electrical Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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Abstract

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A fullerene-based nanocomposite photodetector with peak quantum efficiency over 400% and specific detectivity of 6.5 × 1012 Jones at a wavelength of 390 nm is enabled by a cross-linked polymer:ZnO nanocomposite buffer layer. The introduced ZnO nanoparticles not only increase the photoconductive gain through a trap-controlled electron injection mechanism, but also effectively reduce the noise current, yielding a record linear dynamic range (LDR) of 120 dB.

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