Synthesis and characterization of WO3 thin films by surfactant assisted spray pyrolysis for electrochromic applications

► WO3 thin films obtained by surfactant/polymer mediated spray pyrolysis. ► Solvation/interaction of WCl6 in/with surfactant changed solution properties. ► Film growth, crystallinity and topography influenced by solution composition. ► Film moisture sensitivity/wettability increased with surfactant content. ► Electrochromic activity of templated WO3 films tested in ionic liquid.