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Study on the Thermal Stability of PEDOT/PSS Film Hybrided with Graphene Oxide

그래핀 옥사이드와 복합화한 PEDOT/PSS 필름의 열적 안정성에 관한 연구

  • Choi, Jong Hyuk (Department of Polymer Engineering, College of Engineering, Suwon University) ;
  • Park, Wan-Su (Department of Polymer Engineering, College of Engineering, Suwon University) ;
  • Lee, Seong Min (EverChemTech Co., Ltd.) ;
  • Chung, Dae-won (Department of Polymer Engineering, College of Engineering, Suwon University)
  • 최종혁 (수원대학교 공과대학 신소재공학과) ;
  • 박완수 (수원대학교 공과대학 신소재공학과) ;
  • 이성민 ((주) 에버켐텍) ;
  • 정대원 (수원대학교 공과대학 신소재공학과)
  • Received : 2016.05.23
  • Accepted : 2016.06.15
  • Published : 2016.08.10

Abstract

In order to investigate the thermal stability of electro-conductive poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT/PSS), we have prepared films by casting PEDOT/PSS aqueous solution without using a binding material and measured surface resistances of the films while annealing at $200^{\circ}C$. Electrical properties of films were improved by annealing, and the maximum conductivity ($540S{\cdot}m^{-1}$) after annealing for 2 hrs was found to be approximately 3 times higher than that ($180S{\cdot}m^{-1}$) of the original film. The conductivities, however, dramatically decreased with an increase in annealing time and dissipated after 24 hrs of annealing. On the other hand, PEDOT/PSS films hybridized with graphene oxide (GO) displayed a salient improvement in conductivity by annealing, which was measured to be around $600S{\cdot}m^{-1}$ even after 30 hrs of annealing at $200^{\circ}C$. We tentatively conclude that hybridization with GO enhances the thermal stability of PEDOT/PSS.

Acknowledgement

Supported by : 한국산업기술평가관리원(KEIT)

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