Multilayered composite Au-NiOx electrochromic films

In this work is reported the growth of multilayered composite Au-NiOx films by sputtering, using different deposition pressures that allow varying the Au content inside the oxide matrix. The films were characterized by RBS, XRD, TEM, cyclic voltammetry and spectral transmittance measurements. The films present anodic electrochromism, and those containing Au show a selective absorption in the green region of the visible spectrum in the bleached state, which was observed after the intercalation/deintercalation process. Au reduction process occurs during electrochemical cycling.