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Spray coating of electrochemically exfoliated graphene/conducting polymer hybrid electrode for organic field effect transistor

Authors
Kim, YounKwon, Yeon JuHong, Jin-YongPark, MinwooLee, Cheol JinLee, Jea Uk
Issue Date
25-12월-2018
Publisher
ELSEVIER SCIENCE INC
Keywords
Electrochemically exfoliated graphene; PEDOT: PSS; Spray coating; Electrode; Organic field effect transistor
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.68, pp.399 - 405
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume
68
Start Page
399
End Page
405
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/70867
DOI
10.1016/j.jiec.2018.08.015
ISSN
1226-086X
Abstract
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 cm(2) V-1 s(-1), on/off current ratio = 10(2), 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 cm(2) V-1 s(-1), on/off current ratio = 10(3), 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. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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