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        Multielectrochromic Copolymers Based on Thiophene Derivatives: Tunable Optoelectronic Properties

        Yafei Guo,Gaoyong Liang,Mengjie Dong,Meihui Wang,Xinmin Hao 한국섬유공학회 2022 Fibers and polymers Vol.23 No.9

        In this study, a series of copolymers based on 3-methoxythiophene(MOT) and 3,4-ethylenedioxythiophene(EDOT) have been prepared by electrochemical method in boron trifluoride diethyl etherate (BFEE). The copolymers arecharacterized by FTIR, XPS, SEM and cyclic voltammograms. The MOT/EDOT ratio in the polymer chain decreases withthe decreasing MOT/EDOT feed ratio, and low polymerization potential incorporates more EDOT units into the polymerchain. The electrochromic properties of the copolymers can be greatly tuned by the applied MOT/EDOT feed ratio. Absorption peak of the neutral copolymer presents red-shift with increasing feed ratio, and each copolymer has multicolorelectrochromism. In addition, the copolymers present fast-switching response, reasonable coloration efficiency and goodstability. All these indicate that the copolymers based on facile, commercial MOT and EDOT are promising candidates forelectrochromic applications.

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