Flexible Electrochromic Devices Based on Optoelectronically Active Polynorbornene Layer and Ultratransparent Graphene Electrodes
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- 作者：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
- 刊名：Macromolecules
- 出版年：2011
- 出版时间：December 27, 2011
- 年：2011
- 卷：44
- 期：24
- 页码：9550-9555
- 全文大小：915K
- 年卷期：v.44,no.24(December 27, 2011)
- ISSN：1520-5835
文摘
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鈥?catalyst and followed by hydrogen reduction. The glass transition temperatures (Tg) of poly(NBPYTPAM) and hydrogenated poly(HNBPYTPAM) were 190 and 175 掳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.