OHMIC Losses on Magnetron-Sputtered PVD Thin-Film TCO Electrodes of the Electrochromic Modules During Their Tinting

The processes influencing on the ohmic losses at the border between the reactively magnetron-sputter deposited thin film oxide FTO electrodes and the polymer electrolyte within the cell of an electrochomic device are considered. The function of the registered full ohmic resistance of the device from the total electrical charge collected during the tinting process is established. The influence of the surface area of the device on the contribution to its total ohmic resistance from the resistance of directly the thin-film oxide electrodes is estimated. The assumption about the presence of a random number of ECD charge carriers on the surface of its electrodes at the initial moment of the coloring process, which also contributes to the initial ohmic resistance of the device, was confirmed by independent impedance spectroscopy of the electrolytic layer.