WO3 Films Grown by Spray Pyrolysis for Smart Windows Applications
COATINGS(2022)
Abstract
WO3 nanostructured thin films were grown using spray deposition on FTO coated glass. The effect of the precursor concentration and the solution quantity, which determines the deposition time, on the electrochemical, electrochromic and optical properties of the WO3 films was investigated. The films were found to exhibit a good electrochromic activity with a reasonably good durability of charge exchange and optical modulation under harsh electrochemical cycling in Li-ion-conducting electrolyte. Associated compositional and structural characteristics were probed by several techniques, indicating that the observed improved durability may be due to the unique WO3 thin films' structuring, the surface of the films consisting of wall-like structures combined with bubble-like islands on a polycrystalline WO3 granular background, that requires further study in greater detail.
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Key words
WO3, electrochromic, spray deposition, electrochemistry, structural properties
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