Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 1, Pages 160-163Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.11.013
Keywords
Conducting polymer; Spectroelectrochemistry; Electrochromic device; Polyindole; Indole-6-carboxylic acid
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A novel electrochromic material, poly(indole-6-carboxylic acid) (Pin), and its application in electrochromic devices (ECDs) are discussed. Pin was switched between yellow in the reduced state and green in the oxidized state. Electrochromic switching of Pin film shows that it has fast switching time and high optical contrast. ECD based on Pin and poly(3,4-ethylenedioxythiophene) (PEDOT) was also fabricated and characterized. The response time of this device was found to be 1.0 s and the optical contrast was 45%. The coloration efficiency (CE) was calculated to be 510 cm(2) C-1. Clear change from green (neutral) to blue-violet color (oxidized) of ECD is demonstrated with robust cycle life. These results provide an avenue for applications of polyindole family in electrochromic devices. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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