Abstract
We prepared phthalate derivatives based flexible electrochromic (EC) cell with gel electrolyte containing DMSO solvent in order to improve memory properties. The cell showed vivid color change from water transparent to three primary colors by electrochemical reduction as similar to the liquid electrolyte cell reported previously. The cell exhibited better coloring and memory properties than the cell containing NMP solvent. The apparent diffusion coefficient for the electron transfer of dimethyl terephthalate (DMT) which shows magenta-color EC is estimated to be 10−6 cm2/sec with chronoamperometric measurement. It is revealed that the DMSO is effective to stabilize the anion radicals of DMT rather than NMP.
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