Abstract
Electrochromic (EC) iridium oxide films were prepared by thermal oxidation of vacuumdeposited Ir-C films. The characteristics of thermally oxidized iridium oxide films (TOIROFs) were compared with those of anodically grown iridium oxide films (AIROFs) and of sputtered iridium oxide films (SIROFs). In brief, the characteristics of the TOIROFs are intermediate between those of AIROFs and SIROFs. The EC behavior of transmissive EC devices consisting of an amorphous WO3 film, nonaqueous electrolyte (propylene carbonate solution containing 1M LiClO4 and small amount of H2O) and TOIROF was also presented. The ECD showed a transmission modulation at 633 nm between -0.6 and -0.2. The excess of H2O in the nonaqueous electrolyte was found to lead to the deterioration of the WO3 films.
