화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.68, 399-405, December, 2018
DOI10.1016/j.jiec.2018.08.015  Export Citation
Spray coating of electrochemically exfoliated graphene/conducting polymer hybrid electrode for organic field effect transistor
Youn Kim1, 2, Yeon Ju Kwon1, Jin-Yong Hong1, Minwoo Park3, Cheol Jin Lee2, †, and Jea Uk Lee1, †
  • 1Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
  • 2School of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea
  • 3Department of Chemical and Biological Engineering, Sookmyung Women’s University, Seoul 04310, Republic of Korea
E-mail:,
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 = 0.15 cm2 V-1 s-1, on/off current ratio = 102, and threshold voltage = -1.57 V). Furthermore, the flexible OFET devices based on the Polydimethlsiloxane (PDMS) substrate and ion gel dielectric layer exhibited higher electrical performances (field effect mobility = 6.32 cm2 V-1 s-1, on/off current ratio = 103, and threshold voltage = -1.06 V) 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.
Keywords:Electrochemically exfoliated graphene;PEDOT:PSS;Spray coating;Electrode;Organic field effect transistor
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