Abstract
An investigation was conducted in electrochromic performance of organotungsten oxide WO x C y films deposited onto 40 Ω/square flexible PET (polyethylene terephthalate)/ITO (indium tin oxide) substrates using atmospheric pressure plasma jet (APPJ) at various precursor injection angles. A precursor [tungsten carbonyl, W(CO) 6;TC] vapor, carried by argon gas, was injected into air plasma torch. The APPJ-synthesized WO x C y films were proven to offer extraordinary electrochromic performance. Cyclic voltammetry (CV) switching measurements indicated that only low driving voltages from −1 to +1 V are needed to offer reversible Li + ion intercalation and de-intercalation in a 1 M LiClO 4–propylene carbonate (PC) electrolyte. Light modulation with up to 72.5% transmittance variation, optical density change of 0.84 and coloration efficiency of 49.6 cm 2/mC at a wavelength of 797.6 nm after 200 cycles of Li + ion intercalation and deintercalation were obtained.
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