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Fabrication of Stretchable Ag Nanowire Electrode and its Electrochromic Application

신축성있는 Ag 나노와이어 전극의 제조 및 전기변색 응용

  • Lee, Jin-Young (School of Electrical, Electronic, and Communication Engineering, Korea University of Technology and Education) ;
  • Han, Song-Yi (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Nah, Yoon-Chae (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Park, Jongwoon (School of Electrical, Electronic, and Communication Engineering, Korea University of Technology and Education)
  • 이진영 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 한송이 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 나윤채 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 박종운 (한국기술교육대학교 전기.전자.통신공학부)
  • Received : 2018.12.16
  • Accepted : 2018.12.19
  • Published : 2019.02.27

Abstract

We report on stretchable electrochromic films of poly(3-hexylthiophene) (P3HT) fabricated on silver nanowire (AgNW) electrodes. AgNWs electrodes are prepared on polydimethylsiloxane (PDMS) substrates using a spray coater for stretchable electrochromic applications. On top of the AgNW electrode, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is introduced to ensure a stable resistance over the electrode under broad strain range by effectively suppressing the protrusion of AgNWs from PDMS. This bilayer electrode exhibits a high performance as a stretchable substrate in terms of sheet resistance increment by a factor of 1.6, tensile strain change to 40 %, and stretching cycles to 100 cycles. Furthermore, P3HT film spin-coated on the bilayer electrode shows a stable electrochromic coloration within an applied voltage, with a color contrast of 28.6 %, response time of 4-5 sec, and a coloration efficiency of $91.0cm^2/C$. These findings indicate that AgNWs/PEDOT:PSS bilayer on PDMS substrate electrode is highly suitable for transparent and stretchable electrochromic devices.

Keywords

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