Electrochromic Properties of Sputtered Ti-Doped WOa Films

摘要

Ti-doped W03 films were prepared by the mid-frequency dual-target magnetronsputtering method.The structure and electrochromic properties of the Ti-doped WO3 films wereanalysed by X-Ray diffraction(XRD),Raman spectroscopy,spectrophotometer,cyclic chronoam-perometry and atomic force microscopy(AFM).The results indicate that the crystallinity decreaseafter the doping of titanium,the channels for ion injection and extraction increase,the respondingspeed with 5.1% titanium doped becomes faster,and its circle life increases more than four timescompared with the undoped WOa film.In the coloured state,the W-O-W bonds decrease,butthe W=O bonds increase.Since the W-O-W bonds break down for Li^+ ions' injection and moreW=O bonds form,it is more convenient to inject Li^+ ions into the Ti-doped film than undopedfilm because more W-O-W bonds break down in the coloured state.