Preparation and Infrared Reflectance Modulation Characteristics of Polycrystalline Tungsten Oxide Film

Polycrystalline tungsten oxide films with good electrochemical stability were prepared by dc reactive sputtering methods. The Raman spectra of the films show that W6+ is reduced to W5+ with Li+ and electrons co-intercalation. Intercalated electrons entere extended states of crystalline tungsten oxide and cause infrared reflectance. The emissivity of WO3/ITO/Glass can be reversible modulated between 0.261-0.589.