Chemosynthesis and photoelectric characterization of a novel solution-processable electrochromic copolymer based on alternating alkoxylating benzene and benzo[1,2-b:4,5-b']dithiophene derivatives

DOI

10.2991/iwmecs-15.2015.120How to use a DOI?

Keywords

Conjugated polymer, Chemical polymerization, Electrochromic, Spectro electro chemistry, Benzo [1, 2-b: 4, 5-b'] dithiophene.

Abstract

The conjugated polymer poly(4,8-bis ((2-octyldodecyl) oxy)benzo [1,2-b:4,5-b'] dithiophene-co-p-didecyloxybenzene) (PBTB), was successfully chemically polymerized by reacting (4,8-bis ((2-octyldodecyl) oxy)benzo [1,2-b:4,5-b']dithiophene-2,6-diyl)bis(trimethylstannane) with respective 2,5- didecyloxy-1, 4-dibromobenzene in favorable yields via Stille cross-coupling reaction. Due to the incorporation of long alkoxy side chain, the resulting copolymer has high solubility in some common organic solvents. Besides, it was characterized by elemental analysis, gel permeation chromatography (GPC), cyclic voltammetry (CV) and UV-Vis-NIR spectroscopy. The electrochemical band-gap and optical band-gap was calculated to be 1.85 eV and 2.03 eV from CV curve and UV-Vis absorption spectrum, respectively. The PBTB film exhibited reversible electrochromic properties and rendered multi-colored display: orange-yellow reduced state (0 V), yellow-gray semi oxidized state (1.15 V) and gray fully oxidized state (1.35 V). In addition, kinetics study of the copolymer film revealed a maximum optical contrast ( T%) of 32%, a fast response time of 0.4 s from the oxidized state to the neutral state and a high coloration efficiency of 267 cm2/C at max of 510 nm in the visible region.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhen Xu
AU  - Jinsheng Zhao
AU  - Weiyu Fan
PY  - 2015/10
DA  - 2015/10
TI  - Chemosynthesis and photoelectric characterization of a novel solution-processable electrochromic copolymer based on alternating alkoxylating benzene and benzo[1,2-b:4,5-b']dithiophene derivatives
BT  - Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences
PB  - Atlantis Press
SP  - 606
EP  - 610
SN  - 2352-538X
UR  - https://doi.org/10.2991/iwmecs-15.2015.120
DO  - 10.2991/iwmecs-15.2015.120
ID  - Xu2015/10
ER  -