Abstract
Electrochromic iridium oxide thin films have been investigated by a new method of electrodeposition. The transparent conductive glass was cathodically electrolyzed in an aqueous solution of 3wt% Ir(SO4)2·nH2O at a constant current density of ca. 30mA/cm2 at 32°C. After this procedure the thin films on transparent conductive glass were heat-treated in an electric furnace at 350°C for 30min. The cyclic voltammograms of electrodepositediridium oxide films (EIROF) shows 2 pairs of peaks at 0.25V (vs SCE) and at 0.7V (vs SCE), which are corresponding to oxidation state and reduction state respectively. Electrodeposited iridium oxide films have a strong adhesion to the transparent conductive glass. It is chemically very stable and showed a good reversibility of ECD. Life test of more than 105 cycles in 0.5M H2SO4 leads to no detectable deterioration.
