Enhanced lithium electrochromism of atmospheric pressure plasma jet-synthesized tungsten/molybdenum oxide films for flexible electrochromic devices

Enhanced lithium electrochromic performances of mixed organo-tungsten oxide (W (x) O (y) C (z) )/organo-molybdenum oxide (Mo (x) O (y) C (z) ) films by a rapid codeposition onto 40 Omega/a- flexible polyethylene terephthalate/indium tin oxide substrates at a short exposed duration of 23 s using an atmospheric pressure plasma jet (APPJ) at various mixed concentrations of hexacarbonyl precursors [W(CO)(6) and Mo(CO)(6)] are investigated. The flexible organo-tungsten-molybdenum oxide (WMo (x) O (y) C (z) ) films demonstrated noteworthy electrochromic performance for 200 cycles of reversible Li+ ion intercalation and deintercalation in a 1 M LiClO4-propylene carbonate electrolyte by the switching measurements of potential sweep from -1 to 1 V at a scan rate of 50 mV/s and the potential step at -1 and 1 V, even after being bent 360(o) around a 2.5-cm diameter rod for 1,000 cycles. The optical modulation (Delta T) of 61.3 % for MoO (y) C (z) films at a wavelength of 795.6 nm was significantly improved up to 72.5 % for WMo (x) O (y) C (z) films cosynthesized with an APPJ.