Abstract
Electrochemical copolymerization of diphenylamine (DPA) with 2,5-dimethoxyaniline (DMA) was performed in aqueous solution for different feed ratios of DPA using cyclic voltammetry. The deposition rate of DPA-DMA copolymer is higher than that of homopolymers (PDPA and PDMA). (DMA-co-DPA) film was deposited using electrochemical polymerization as conducting film on indium tin oxide (ITO) electrode and used as an electrode in an electrochromic device. From the deconvoluted results of X-ray photoelectron spectroscopy, an azeotrope composition of DPA-DMA copolymers exists at DPA feed ratio of 0.5. Poly(3, 4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) was spin-coated on ITO as the other electrode. Polyurethane ionomer (PUI) blended with was used as solid polymer electrolyte. A total solid electrochromic device was assembled as follows: ITO P(DMA-co-DPA) PEDOT:PSS ITO. The columbic efficiency of the devices reached 84% for P(DMA-co-DPA) film with azeotrope composition. The optical contrast of the single electrode and the device were determined by UV-visible spectroelectrochemical studies. A value (31%) of in color upon switching the potential from (vs PEDOT) was noticed for this device. The device was pale yellow at and blue at .
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