Electrochromic Devices Fabricated with Electrolyte Impregnated on Porous Substrate

Abstract

Electrochromic devices, which dynamically change colour under applied potential, are widely studied for use in energy-efficient smart windows. To improve the viability of smart windows, many researchers are utilizing nanomaterials, which can provide electrochromic devices with improved coloration efficiencies, faster switching times, longer cycle lives, and potentially reduced costs. The flexible electrochromic films are promising film for applications in automobiles, buildings, etc. Here, we synthesized nanostructured tungsten trioxide (WO3) particles for electrochromic materials. The thin layers with nanostructured materials of WO3 inks were coated on ITO glass at room temperature, solution-processed method. For comparing the effects of electrolyte, liquid electrolytes were used with/without a porous substrate. Porous substrates can be helpful in leakage issues of liquid electrolytes. The porosity and pore size of porous substrate were parameters for characterization of electrolyte. The coloration efficiencies and cycle performance will be discussed with characteristics of porous substrate.