A neutral state colorless phosphazene/carbazole hybride dendron and its electrochromic device application

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Sezgin M., Özay Ö., Koyuncu S., Özay H., Baycan Koyuncu F.

CHEMICAL ENGINEERING JOURNAL, vol.274, pp.282-289, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 274
  • Publication Date: 2015
  • Doi Number: 10.1016/j.cej.2015.03.134
  • Journal Name: CHEMICAL ENGINEERING JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.282-289
  • Keywords: Electrochromic device, Phosphazene, Carbazole, Dendron
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

In this work, a new phosphazene/carbazole hybride dendron (PC) was synthesized and then directly coated onto ITO glass surface to provide a dendritic polymer network, poly-(PC), by using potentiodynamic electrochemical process. Structure of dendron was identified by FT-IR, H-1 and P-31 NMR, and also TOF-MS analyses. The optical and electrochemical properties of PC and its electrochemical crosslinked product were investigated by using UV-vis absorption, fluorescence and CV techniques. A neutral, colorless electrochromic device was constructed in the sandwich configuration [indium tin oxide (ITO)coated glass/anodically coloring material (poly-(PC))//gel electrolyte//cathodically coloring material (PEDOT)/ITO-coated glass] and revealed a short response time (about 0.5 s), high coloration efficiency (981 cm(2) C-1) and high redox stability. (C) 2015 Elsevier B.V. All rights reserved.