The Study On The All-Solid State Electrochromic Device

Electrochromic(EC) materials are one of functional materials, which have very good application future. It can be used widely in large-area display, light switch, unglaring viewfinder, deposited devices, building glass and smart windows. But if we want to make this product in practice, the all-solid state electrochromic device must be making. At present, the investigation about this aspect is concentrate on the pure inorganic cathodal electrochromic materials like WO3 and organic electrochromic materials like Prussian blue and Polyaniline. But for the doped electrochromic materials, the research is very lack. In this articles, we research the all-solid state electrochromic device which EC layer is WO3 doped with TiO2 MoO3 CrO3 PEO,CE layer is CeO2 doped with TiO2, and IC layer is epichlorohydrin crosslinked polyethenoxy ether gel macro- molecule electrolyte. In this articles, we research the color change, responding time, electrochemistry performance, preserving time, and lay importance on the research in the circle times, crystal structure and the uniformity, stability and suitable viscosity of precursors.From the experiment, it is found that The four-member doped tungstic acid sol is very stable which can be stored more than two months at room temperature. Doping of TiO2 MoO3 CrO3 PEO also improves the stability of sols, the performance of this electrochromic materials. When the optimum sintering treatment temperature is 200C, the EC layer has excellent electrochemistry performance and firmly integrated with glass substrate. Doping of TiO2 improves the stability of CeO2 and change the electrochemistry performance of sols markedly. When the optimum sintering treatment temperature is 180 C, the CE layer has excellent electrochemistry performance and firmly integrated with glass substrate, too. With the concentration of LiClO4 turning higher, the viscosity of epichlorohydrin crosslinked polyethenoxy ether macromolecule electrolyte increases and the ionic conductivity decreases. With these three layers, the all-solid state electrochromic device has excellentelectrochemistry performance, long color preserving time and its life-span is longer than five months.