Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on Improving Electrical Conductivity for Conducting Polymers and their Applications to Transparent Electrodes

전도성 고분자의 전기전도도 향상 연구 및 이를 이용한 투명전극 응용

  • Im, Soeun (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Soyeon (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Seyul (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Felix Sunjoo (Department of Chemical Engineering and Materials Science, Chung-Ang University) ;
  • Kim, Jung Hyun (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 임소은 (연세대학교 화공생명공학과) ;
  • 김소연 (연세대학교 화공생명공학과) ;
  • 김세열 (연세대학교 화공생명공학과) ;
  • 김선주 (중앙대학교 화학신소재공학부) ;
  • 김중현 (연세대학교 화공생명공학과)
  • Received : 2015.09.30
  • Accepted : 2015.11.15
  • Published : 2015.12.10
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Abstract

As the need for next-generation flexible electronics grows, novel materials and technologies that can replace conventional indium tin oxide (ITO) for transparent electrodes have been of great interest. Among them, a conducting polymer, especially poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS) is one of the most promising candidates because it is mechanically flexible, inexpensive, and capable of being processed in solution. Currently, there are a lot of research efforts on enhancing its electrical conductivity to the level of ITO or metal electrodes through chemical and/or physical processing. In this review article, we present various additives and pre-/post-deposition processing methods for improving the electrical conductivity of PEDOT : PSS. Some of representative reports are also introduced, which demonstrated the use of conductivity-enhanced PEDOT : PSS as transparent electrodes in electronics and energy conversion.

투명 전극의 응용분야가 확대되고 시장의 규모가 커짐에 따라 기존 투명 전극 재료인 ITO (Indium Tin Oxide)를 대체할 차세대 투명전극의 개발에 관심이 집중되고 있다. 다양한 후보군 중에서도 대표적인 전도성 고분자인 PEDOT : PSS [poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate)]는 기계적 유연성을 갖고 있으면서도 소재와 공정 상의 가격 경쟁력이 크기 때문에 미래 소자 구현을 위한 투명전극 재료로 주목을 받고 있으며, 현재 PEDOT : PSS의 전기전도도 수준을 ITO나 금속의 수준으로 향상시키기 위해 다양한 화학적/물리적 처리를 통한 기능성 향상에 많은 연구가 진행 중이다. 본 총설에서는 전도성 고분자의 전기 전도도를 향상시키기 위한 다양한 공정 기술에 대한 연구 현황을 짚어보고자 한다. 대표적으로 유기용매, 이온성 액체, 계면활성제 등과 같은 첨가제와 박막에 대한 산 처리 공정, 물리적 인장을 통한 전기전도도 향상 연구를 들 수 있다. 또한 이러한 공정을 적용하여 전도성 고분자 투명 전극을 전자 및 에너지 소자에 응용한 사례도 간략히 소개하고자 한다.

Keywords

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