Abstract

Polycrystalline tungsten oxide films with good electrochemical stability were prepared by dc reactive sputtering method. The Raman spectra of these films show that the W 6+ ions were reduced to W 5+ with the co-intercalation of Li + ions and electrons. Intercalated electrons entered extended states of crystalline tungsten oxide and caused infrared reflectance variation, therefore, the emissivity of WO 3/ITO/glass can be reversible modulated between 0.261 and 0.589.

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