Journal of Industrial and Engineering Chemistry

  • 제68권
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  • Pages.399-405
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  • 2018
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  • 1226-086X(pISSN)
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  • 1876-794X(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
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Spray coating of electrochemically exfoliated graphene/conducting polymer hybrid electrode for organic field effect transistor

  • Kim, Youn (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kwon, Yeon Ju (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Hong, Jin-Yong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Park, Minwoo (Department of Chemical and Biological Engineering, Sookmyung Women's University) ;
  • Lee, Cheol Jin (School of Electrical Engineering, Korea University) ;
  • Lee, Jea Uk (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
  • 투고 : 2018.07.10
  • 심사 : 2018.08.26
  • 발행 : 2018.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

We report the fabrication of organic field-effect transistors (OFETs) via spray coating of electrochemically exfoliated graphene (EEG) and conducting polymer hybrid as electrodes. To reduce the roughness and sheet resistance of the EEG electrodes, subsequent coating of conducting polymer (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)) and acid treatment was performed. After that, active channel layer was developed by spin coating of semiconducting poly(3-hexylthiophene) on the hybrid electrodes to define the bottom gate bottom contact configuration. The OFET devices with the EEG/PEDOT:PSS hybrid electrodes showed a reasonable electrical performances (field effect mobility = $0.15cm^2V^{-1}\;s^{-1}$, on/off current ratio = $10^2$, and threshold voltage = -1.57V). Furthermore, the flexible OFET devices based on the Polydimethlsiloxane (PDMS) substrate and ion gel dielectric layer exhibited higher electrical performances (field effect mobility = $6.32cm^2V^{-1}\;s^{-1}$, on/off current ratio = $10^3$, and threshold voltage = -1.06V) and excellent electrical stability until 1000 cycles of bending test, which means that the hybrid electrode is applicable to various organic electronic devices, such as flexible OFETs, supercapacitors, organic sensors, and actuators.

키워드

과제정보

연구 과제 주관 기관 : Korea Research Institute of Chemical Technology (KRICT), National Research Foundation of Korea (NRF)

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