Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
권호 표지

Electrochromic Property of a Conductive Polymer Film Fabricated with Vapor Phase Polymerization

증기중합으로 제조된 전도성 고분자 박막의 전기 변색 특성

  • Lee, Ji-Yea (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Yu-Na (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Eun-Kyoung (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 이지예 (연세대학교 화공생명공학과) ;
  • 김유나 (연세대학교 화공생명공학과) ;
  • 김은경 (연세대학교 화공생명공학과)
  • Received : 2009.12.08
  • Accepted : 2009.12.29
  • Published : 2010.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT), which has the highest stability in conducting polymer was employed to electrochromic (EC) film and studied about electrochromic properties according to the film fabrication method. PEDOT films were coated by two different methods, electropolymerization (EP) and vapor phase polymerization (VPP). Both of PEDOT films showed dark blue color at dedoped neutral state. Spectroelectrochemistry, switching ability and stability of the devices were investigated by UV-Vis Spectrophotometer and Cyclic voltammetry. Surface morphologies of the PEDOT VPP film at oxidized and reduced state were obtained by AFM. The average surface roughness of the PEDOT-VPP film was 50 nm and more homogeneous than that of the PEDOT-EP. The EC property from the PEDOT-VPP film was improved compared to that of the PEDOT-EP film, to show a response time of 1.5 sec, transmittancechange of 49%, and coloration efficiency of 402.

전도성 고분자 중 안정성이 높은 Poly(3,4-ethylenedioxythiophene) (PEDOT)을 이용하여 전기변색 박막을 제조하고 박막제조 방법에 따른 전기변색 특성을 연구하였다. PEDOT 박막은 전기중합법과 증기중합법에 의해 제조되었고, 두가지 방법 모두 도핑되지 않은 중성 상태에서 짙은 푸른색을 띠는 박막으로 제조되었다. 전기변색 특성을 평가하기 위하여 UV-Vis spectrophotometer와 Cyclic voltammetry가 사용되었으며, 산화/환원 시 표면은 AFM으로 관찰되었다. 전기 중합법으로 제조된 PEDOT 박막에 비해 증기중합에 방법에 의해 제작된 PEDOT 박막의 표면이 거칠기 50 nm 이내로 균일 하였다. 특히 증기 중합법을 이용하여 제조된 전기 변색 소재의 특성도 응답성 1.5초 이내, 49%의 투과율 차이, 402의 변색 효율을 보여 박막의 특성 향상으로 전기변색특성이 향상 된 결과를 보였다.

Keywords

References

  1. R. J. Mortimer, "Electrochromic materials", Chem. Soc. Rev., 26, 147 (1997). https://doi.org/10.1039/cs9972600147
  2. J. Lee, Y. N. Kim, Y. J. Kim, J. Back, and E. Kim, "Multi-Color E1ectrochromic Device Based on Organic E1ectrochromic Materials", Mol. Cryst. Liq. Cryst., 491, 74 (2008). https://doi.org/10.1080/15421400802329178
  3. P. M. S. Monk, R. J. Mortimer, and D. R. Rosseinsky, Electrochromism : Fundamentals and Applications, VCH Ltd. (1995).
  4. Y. Kim and E. Kim, "Electrochromic properties of nanochromic windows assembled by the layer-bylayer self-assembly technique", Curr. Appl. Phys., 6, e202 (2006). https://doi.org/10.1016/j.cap.2006.01.040
  5. R. J. Mortimer, K. R. Graham, C. R. G. Grenier, and J. R. Reynolds, "Influence of the Film Thickness and Morphology on the Colorimetric Properties of spray-Coated Electrochromic Disubstituted 3,4-Propylenedioxythiophene Polymers", Appl. Mater. Interfaces., 10, 2269 (2009).
  6. Y. Kim and E. Kim, "Conductive Polymer Patterning on a Photoswitching Polymer Layer", Macromol. Res., 14, 584 (2006). https://doi.org/10.1007/BF03218728
  7. J. Seo, D. Roh, J. Park, J. Koh, S. Maken, and J. Kim, "Preparation of Proton Conducting Crosslinked Membranes From PS-b-PHEA Diblock Copolymer and Poly(vinyl alcohol)", Membrane Journal, 18, 23 (2008).
  8. J. Roncali, "Conjugated poly(thiophenes): synthesis, functionalization, and applications", J. Chem. Rev., 92, 711 (1992). https://doi.org/10.1021/cr00012a009
  9. Y. Coskun, A. Cirpan, and L. Toppare, "Construction of electrochromic devices using thiophene based conducting polymers", J. Mater. Sci., 42, 368 (2007). https://doi.org/10.1007/s10853-006-1076-6
  10. K. Grunathan, A. V. Murugan, R. Marimuthu, U. P. Mulik, D. P. Amenerkar, "Electrochemically synthesised conducting polymeric materials for applications towards technology in electronics, optoelectronics and energy storage devices", Mater. Chem. Phys., 61, 173 (1999). https://doi.org/10.1016/S0254-0584(99)00081-4
  11. B. W. Jensen, D. W. Breiby, and K. West, "Base inhibited oxidative polymerization of 3,4-ethylenedioxy thiophene with iron(III)tosylate", Synthetic Metals, 152, 1 (2005). https://doi.org/10.1016/j.synthmet.2005.07.085
  12. N. Sakmeche, J. J. Aaron, M. Fall, S. Aeiyach, M. Jouini, J. C. Lacroix, and P. C. Lacaze, "Anionic micelles; a new aqueous medium for electropolymerization of poly(3,4-ethylenedioxythiophene) films on Pt electrodes", Chem. Commun., 2723 (1996).
  13. B. Winther-Jensen and K. West, "Vapor-Phase Polymerization of 3,4-Ethylenedioxythiophene: A Route to Highly Conducting Polymer Surface Layers", Macromolecules, 37, 4538 (2004). https://doi.org/10.1021/ma049864l
  14. G. A. Sotzing, J. R. Reynolds, and P. J. Steel, "Electrochromic Conducting Polymers via Electrochemical Polymerization of Bis(2-(3,4-ethylenedioxy) thienyl) Monomers", Chem. Mater., 8, 882 (1996). https://doi.org/10.1021/cm9504798
  15. Y. Hwang and H. Ko, "Electrochromic Polymers and Devices", Polym. Sci. Technol., 20, 307 (2009).
  16. A. A. Argun, P. H. Aubert, B. C. Thompson, I. Schwendeman, C. L. Gaupp, J. Hwang, N. J. Pinto, D. B. Tanner, A. G. MacDiarmid" and J. R. Reynolds, "Multicolored Electrochromism in Polymers : Structures and Devices", Chem. Mater., 16, 4401 (2004). https://doi.org/10.1021/cm049669l