M. Ouyang, Genghao Wang, Yujian Zhang
Apr 1, 2011
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Influential Citations
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Journal
Journal of Electroanalytical Chemistry
Abstract
Abstract Copolymer of 1,4-di(thiophen-3-yl)benzene (DTB) with 3,4-ethylenedioxy-thiophene (EDOT) was electrochemically synthesized and characterized. Resulting copolymer film presents excellent electrochromic properties. At the neutral state, λ max value due to the π–π * transition is found to be 496 nm and energy gap ( Eg ) is calculated as 1.92 eV. Besides, the copolymer film possesses four various colors (red, yellow, green and blue) under different potentials. Otherwise, the electrochromic switching results show that the copolymer film has fast switching time (0.8 s at 746 nm) and high optical contrast (59% at 1100 nm). Cyclic voltammetry study reveals that the copolymer film has excellent stability.