Solid state electrochromic display based on polymer electrode-polymer electrolyte interface

Abstract

The electropolymerization of ortho-toluidine and ortho-anisidine gave uniform electroactive polymer films which were analysed by cyclic voltammetry, impedance and uv-vis absorption spectra. These films exhibit a reversible electrochemical response during cyclic voltammetry experiments in aqueous, non-aqueous and polymer electrolytes. Their electrochromic efficiency is high in aqueous and non-aqueous electrolytes but decreases in the polymer electrolyte. A solid state cell having the configuration ITO/TiO2-CeO2/LiN(SO2CF3)2-PEO complex/polymer/ITO, has been assembled. The transmittance variation of this system between the oxidized and reduced state is about 20% at 632.8 nm.