All-solid-state Electrochromic Window of Electrodeposited WO₃ and Prussian Blue with Poly(ethylene oxide) Gel Electrolyte

Abstract

An all-solid-state electrochromic window (SEW) employing electrodeposited WO 3 and prussian blue with polymer gel electrolyte has been fabricated. The conductivity of poly(ethylene oxide) (PEO)-based gel electrolyte was 4.6×10 -4 S/cm at room temperature. The W 4f core level spectra of WO 3 film at different levels of coloration have been investigated using XPS. W 4f peaks become broader after coloration. The SEW has been found to have excellent electrochromism and memory characteristics. A reversible color change between blue and colorless was observed when an appropriate potential was applied repeatedly to the electrochromic window.