화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.27, No.3, 243-249, March, 2019
DOI10.1007/s13233-019-7045-0  Export Citation
Synchronous Polymerization of 3,4-Ethylenedioxythiophene and Pyrrole by Plasma Enhanced Chemical Vapor Deposition (PECVD) for Conductive Thin Film with Tunable Energy Bandgap
Sanghoon Kim1, Joon Suk Oh2, Taeseon Hwang3, Hee Won Seo4, Dong-Cheol Jeong5, 6, Jun-Ho Lee1, Long Wen7, 8, Changsik Song5, 6, Jeon Geon Han7, 8, and Jae-Do Nam1, 4, †
  • 1Department of Energy Science, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
  • 2Center for Soft Matter Research, Department of Physics, New York University, 726 Broadway, New York, NY 10003, United States, USA
  • 3Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States, USA
  • 4School of Chemical Engineering, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
  • 5Department of Chemistry, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
  • 6Chemical and Biological Defense Research Center, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
  • 7NU-SKKU Joint Institute for Plasma-Nano Materials, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
  • 8Center for Advanced Plasma Surface Technology, Sungkyunkwan University, Suwon, Gyeonggi 16419, Korea
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Using a plasma enhanced chemical vapor deposition (PECVD) technique, a synchronous polymerization of 3,4-ethylenedioxythiophene (EDOT) and pyrrole monomers was investigated for the development of thin films with adjusted optoelectronic properties. Maintaining a constant amount of EDOT- and pyrrole-feed in the presence of a carrier gas, the PECVD reaction power was varied in the range of 10?100 W to give different physicochemical states of composite films composed of poly(3,4-ethylenedioxythiophene) (PEDOT) and polypyrrole (PPy). The deposition rate gradually increased with the reaction power reaching the highest deposition rate at 30 nm/min (100 W) in this study. The energy bandgap of the plasma-polymerized PEDOT/PPy copolymer films increased from 2.62 to 3.27 eV as the applied power density increased from 10 to 100 W in a continuous way, that could desirably ensure a tunable control of bandgaps in thin films. The electrical conductivity and the surface roughness of the thin films continuously increased from 1.59×10-4 to 2.28×10-2 S/m and from 0.2 to 1.9 nm respectively, as the applied power density decreased. The plasma-polymerized PEDOT/PPy copolymer is expected to find its application in various optoelectronic devices including the hole injection layer (HIL) in organic light-emitting diodes (OLEDs), and organic photovoltaics (OPVs) for the improved energy match.
Keywords:3,4-ethylenedioxythiophene;pyrrole;synchronous polymerization;plasma power;tunable bandgap
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