Abstract
An investigation has been undertaken into the improved lithium electrochromic performance of flexible tungsten oxide films by the addition of iron oxides via one step synthesis onto flexible 60 Ω/square polyethylene terephthalate/indium tin oxide substrates using a low temperature plasma polymerization method. The flexible organic–inorganic hybrid nanocomposite WOyCz, WFexOyCz and FeOyCz films are synthesized by injecting the precursors tungsten carbonyl [W(CO)6] and/or ferrocence [Fe(C5H5)2] into the plasma chamber. The capable fractions of the nano-grain boundaries between the nano-grains produced in the WOyCz and WFexOyCz films assure the reversible Li+ intercalation and deintercalation properties. The addition of iron oxides into tungsten oxide films at a certain Fe gas flow ratio enhances the optical modulation (ΔT) from 74.4 to 80.7 %, increases the optical density (ΔOD) from 0.71 to 0.92, and raises the color efficiency (η) from 48.8 to 56.6 cm2/C, respectively, at a wavelength of 721 nm, even after 200 cycles of reversible Li+ ion intercalation/de-intercalation in a 1 M LiClO4-propylene carbonate electrolyte.
Published Version
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