Flexible electrochromic devices based on optoelectronically active polynorbornene layer and ultratransparent graphene electrodes

Wei Ren Lian, Ying Chi Huang, Yi An Liao, Kun Li Wang, Lain-Jong Li, Ching Yuan Su, Der Jang Liaw*, Kueir Rarn Lee, Juin Yih Lai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Novel electrochromic polynorbornenes poly(NBPYTPAM) and poly(HNBPYTPAM), containing electroactive chromophores, were prepared via ring-opening metathesis polymerization (ROMP) from a new norbornene derivative (NBPYTPAM) using Grubbs' catalyst and followed by hydrogen reduction. The glass transition temperatures (T g) of poly(NBPYTPAM) and hydrogenated poly(HNBPYTPAM) were 190 and 175 °C, respectively. The cyclic voltammogram of the poly(HNBPYTPAM) film cast onto flexible graphene-coated polyethylene terephthalene (PET) substrates exhibited two reversible oxidation redox couples at 1.0 and 1.9 V. Flexible electrochromic devices were fabricated from the electroactive polymers and graphene-coated PET substrates. The electrochromic characteristics of poly(HNBPYTPAM) showed excellent stability and reversibility, with multistaged color changes from its yellow neutral form to green and then to dark-blue.

Original languageEnglish (US)
Pages (from-to)9550-9555
Number of pages6
JournalMacromolecules
Volume44
Issue number24
DOIs
StatePublished - Dec 27 2011

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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