Electrochromic devices based on copolymers of 3-Trimethoxysilanylpropyl-N-aniline-2,5-Dimethoxyaniline |
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| Authors: | Chien-Hsin Yang Shyh-Jiun Liu Chia-Chin Chang Li-Ying Lin |
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| Affiliation: | aDepartment of Chemical and Material Engineering, Southern Taiwan University of Technology, 1 Nan-Tai Street, Yung-Kang City, Tainan 710, Taiwan;bDepartment of Nature Science Education, National University of Tainan, Tainan 701, Taiwan;cInstitute of Environmental Ecology, National University of Tainan, Tainan 701, Taiwan |
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| Abstract: | Electrochemical copolymerization of 3-trimethoxysilanyl-propyl-N-aniline (TMSPA) with 2,5-dimethoxyaniline (DMA) was performed in 1 M HCl aqueous solution for different feed ratios of TMSPA using cyclic voltammetry. The deposition rate of TMSPA–DMA copolymer is higher than that of PTMSPA but lower than that of PDMA. (TMSPA-co-DMA) film was deposited using electrochemical polymerization as conducting film on indium tin oxide (ITO) electrode and used as an electrode in an electrochromic device. Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) was spin-coated on ITO as the other electrode. Carboxyl-terminated- butadiene-acrylonitrile (CTBN) blended with LiClO4 was used as solid polymer electrolyte. A total solid electrochromic device was assembled as follows: ITO|P(TMSPA-co-DMA) LiClO4-CTBNPEDOT:PSS|ITO. The columbic efficiency of the devices reached to 104% for P(TMSPA-co-DMA) film with TMSPA feed ratio of 0.25. The optical contrast (ΔT, %) of the single electrode and the device were determined by UV–vis spectroelectrochemical studies. The stability of ΔT was improved during color switching from +1.5 to −1.5 V (vs. PEDOT) for this device. The device was pale yellow at −1.5 V and blue at +1.5 V. |
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| Keywords: | Poly(3-trimethoxysilanylpropyl-N-aniline-co-2,5-dimethoxylaninediphenylamine) [P(TMSPA-co-DMA)] Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) Total solid electrochromic device |
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