CONDUCTIVE POLYHETEROCYCLES AS ELECTRODE MATERIALS IN SOLID-STATE ELECTROCHROMIC DEVICES

By combining an electronically conductive polymer, a solid state polym er electrolyte and a metal oxide (vanadium oxide), a solid state elect rochemical cell was constructed. The optical absorption of the cell co uld easily be changed by changing the applied cell potential. The poly meric materials used have the advantage of very easy fabrication of th in films: spin-coating or solution-casting for poly(3-octylthiophene) and template polymerization for polypyrrole. Owing to the difference i n coulombic capacity and coloration efficiency between the metal oxide and the conjugated polymer, the optical changes of the cell are mainl y due to optical changes of the polymer. Thus, this technique can also be used for studying the doping process of the polymer and the stabil ity of the states induced by doping.