Article
  • Raman Spectroscopic Studies of Ionic Liquid Effects on Electro-conductive PEDOT:PSS Thin Film

  • Hyuck Sik Wang, Seok Hyeon Kim, Seung Yeun Joe, Seung Heouk Lee, Insun Kim*, and Kigook Song†

  • Department of Advanced Materials Engineering for Information and Electronics, Materials Research Center for Information Display, Kyung Hee University, Yongin, Gyeonggi-do 17104, Korea
    *Foris Co., #102 Business Incubator, 1731 Deokyeong-daero Yeongtong-gu, Suwon, Gyeonggi-do 16710, Korea

  • 라만 분광실험을 이용한 전기전도성 PEDOT:PSS 박막에 대한 이온성 액체의 영향 연구

  • 왕혁식 · 김석현 · 조승연 · 이승혁 · 김인선* · 송기국†

  • 경희대학교 정보전자신소재공학과, 영상정보소재기술연구센터, *(주)포리스

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films with improved conductivity were obtained through the polyethylene glycol doping process or ionic liquid post treatment. By the curve-fitting analysis of the symmetric stretching vibration of thiophene ring in PEDOT:PSS Raman spectra obtained before and after the doping process, it was found that the peak belonged to the quinoid structure increased its intensity compared to the peak of the benzoid structure. The observed conductivity enhancement due to the structural change of PEDOT chains could be explained using the Raman experimental data.


Polyethylene glycol을 이용한 doping 또는 이온성 액체의 후처리 과정을 통하여 전도도가 향상된 poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) 박막을 얻을 수 있었다. PEDOT:PSS를 도핑하기 전과 후 라만 스펙트럼에서 PEDOT thiophene ring의 대칭신축운동 밴드를 curve-fitting으로 분석하면 quinoid 구조의 피크세기가 benzoid 구조 피크에 비하여 상대적으로 커지는 것을 볼 수 있었다. 이와 같은 라만 피크 세기 변화를 조사함으로써 도핑에 의한 PEDOT 사슬 구조의 변화와 이에 따른 전기전도도의 증가를 설명할 수 있었다.


Keywords: Raman, conductive polymer, PEDOT:PSS, electrical conductivity, ionic liquid

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2018; 42(1): 80-86

    Published online Jan 25, 2018

  • 10.7317/pk.2018.42.1.80
  • Received on Jul 13, 2017
  • Revised on Aug 14, 2017
  • Accepted on Aug 16, 2017

Correspondence to

  • Kigook Song

  • Department of Advanced Materials Engineering for Information and Electronics, Materials Research Center for Information Display, Kyung Hee University, Yongin, Gyeonggi-do 17104, Korea

  • E-mail: ksong@khu.ac.kr