Solid-state electrochromic devices using pTMC/PEO blends as polymer electrolytes

P. C. Barbosa, L. C. Rodrigues, M. M. Silva, M. J. Smith, A. J. Parola, F. Pina, Carlos Pinheiro

Research output: Contribution to journalConference article

35 Citations (Scopus)

Abstract

Flexible, transparent and self-supporting electrolyte films based on poly(trimethylene carbonate)/poly(ethylene oxide) (p(TMC)/PEO) interpenetrating networks doped with LiClO4 were prepared by the solvent casting technique. These novel solid polymer electrolyte (SPE) systems were characterized by measurements of conductivity, cyclic voltammetry, differential scanning calorimetry and thermogravimetry. The incorporation of solid electrolytes as components of electrochromic devices can offer certain operational advantages in real-world applications. In this study, all-solid-state electrochromic cells were characterized, using Prussian blue (PB) and poly-(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT) as complementary electrochromic compounds on poly(ethyleneterphthalate) (PET) coated with indium tin oxide (ITO) as flexible electrodes. Assembled devices with PET/ITO/PB/SPE/PEDOT/ITO/PET "sandwich-like" structure were assembled and successfully cycled between light and dark blue, corresponding to the additive optical transitions for PB and PEDOT electrochromic layers. The cells required long cycle times (>600 s) to reach full color switch and have modest stability towards prolonged cycling tests. The use of short duration cycling permitted the observation of changes in the coloration-bleaching performance in cells with different electrolyte compositions.

Original languageEnglish
Pages (from-to)1495-1502
Number of pages8
JournalElectrochimica Acta
Volume55
Issue number4
DOIs
Publication statusPublished - 25 Jan 2010
Event11th International Symposium on Polymer Electrolytes - Ofir, Portugal
Duration: 31 Aug 20085 Sep 2008

Keywords

  • All-solid-state electrochromic displays
  • Interpenetrating networks
  • Lithium perchlorate
  • PEDOT
  • Poly(ethylene oxide)
  • Poly(trimethylene carbonate)
  • Prussian blue
  • Solid polymer electrolytes

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