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Polymers 2016, 8(10), 368; doi:10.3390/polym8100368

Copolymers Based on 1,3-Bis(carbazol-9-yl)benzene and Three 3,4-Ethylenedioxythiophene Derivatives as Potential Anodically Coloring Copolymers in High-Contrast Electrochromic Devices

1
Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan
2
Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
3
Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan
4
Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Chih-Feng Huang
Received: 14 September 2016 / Revised: 8 October 2016 / Accepted: 10 October 2016 / Published: 19 October 2016
(This article belongs to the Special Issue Functionally Responsive Polymeric Materials)
View Full-Text   |   Download PDF [5303 KB, uploaded 19 October 2016]   |  

Abstract

In this study, copolymers based on 1,3-bis(carbazol-9-yl)benzene (BCz) and three 3,4-ethylenedioxythiophene derivatives (3,4-ethylenedioxythiophene (EDOT), 3,4-(2,2-dimethylpropylenedioxy)thiophene (ProDOT-Me2), and 3,4-ethylenedithiathiophene (EDTT)) were electrochemically synthesized and their electrochemical and electrochromic properties were characterized. The anodic copolymer P(BCz-co-ProDOT) with BCz/ProDOT-Me2 = 1/1 feed molar ratio showed high optical contrast (ΔT%) and coloring efficiency (η), measured as 52.5% and 153.5 cm2∙C−1 at 748 nm, respectively. Electrochromic devices (ECDs) based on P(BCz-co-EDOT), P(BCz-co-ProDOT), and P(BCz-co-EDTT) as anodic polymer layers, and poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) (PEDOT-PSS) as cathodic polymer layer were fabricated. P(BCz-co-ProDOT)/triple-layer PEDOT-PSS ECD showed three different colors (light yellow, yellowish-blue, and dark blue) at different applied potentials. In addition, the highest optical contrast (ΔT%) of P(BCz-co-ProDOT)/triple-layer PEDOT-PSS ECD was found to be 41% at 642 nm and the coloration efficiency was calculated to be 416.5 cm2∙C−1 at 642 nm. All ECDs showed satisfactory optical memories and electrochemical cyclic stability. View Full-Text
Keywords: electrochromic device; conducting polymer; electrochemical polymerization; optical contrast; coloration efficiency; poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) electrochromic device; conducting polymer; electrochemical polymerization; optical contrast; coloration efficiency; poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid)
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MDPI and ACS Style

Kuo, C.-W.; Wu, T.-L.; Lin, Y.-C.; Chang, J.-K.; Chen, H.-R.; Wu, T.-Y. Copolymers Based on 1,3-Bis(carbazol-9-yl)benzene and Three 3,4-Ethylenedioxythiophene Derivatives as Potential Anodically Coloring Copolymers in High-Contrast Electrochromic Devices. Polymers 2016, 8, 368.

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