펄스 파형의 산화전류 인가에 의해 제조도니 이리듐 금속 산화물의 전기변색 특성

초록

Thin films of irridium hydroxide to be used as an electrochromic material were prepared by pulsed anodic current electrodeposition onto indium tin oxide(ITO) coated glass substrates. Before the pulsed electrodeposition, iridium hydroxide films formed by cyclic voltammetry(CV) played an important role in good adhesion as a seed layer. Iridium hydroxide films with light-blue color were deposited with a charge of 100 mC/cm2. During CV experiment in phosphate buffered saline solution, electrodeposited iridium hydroxide films exhibited anodic electrochromism of blue and black color at two oxidation potentials of +0.5V and +0.9V(vs.SCE). repespectively, while on the cathodic scan, black thin film became colorless. When +0.9V and -0.7V were applied for coloring and bleaching observation in different pulse voltammetry, minimal times needed for each process are 9 sec and 5 sec, respectively.