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Poly(3-hexylthiophene)/Gold Nanoparticle Hybrid System with an Enhanced Photoresponse for Light-Controlled Electronic Devices

Authors

  • Su-Ting Han,

    1. Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR
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  • Ye Zhou,

    1. Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR
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  • Qing-Dan Yang,

    1. Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR
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  • Chun-Sing Lee,

    1. Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR
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  • V. A. L. Roy

    Corresponding author
    • Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR
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E-mail: val.roy@cityu.edu.hk

Abstract

Light-controlled electrical behavior of polymer/nanoparticle hybrid system in ambient condition is demonstrated. By embedding gold nanoparticles (Au NPs) in a poly(3-hexylthiophene) (P3HT) matrix, the photoresponses of the nanocomposite films are enhanced. The electrical behavior of the P3HT/Au NPs nanocomposite transistors and inverters are tuned over a wide range in depletion mode. UV-visible absorption spectroscopy, ultraviolet photoelectron spectroscopy (UPS), and steady-state photoluminescence (PL) spectroscopy are used to analyze the nanocomposite films. The findings provide a better understanding of light-induced threshold voltage shifts of P3HT-based field-effect transistors and inverters and demonstrate their potential applications in electronic signal modulation for solution-processed integrated circuits.

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