Abstract
Nanoporous NiO thin films were fabricated on indium tin oxide glass by simple chemical bath deposition (CBD). Dense porous structure was formed by NiO flakes with thickness controlled by aluminum through CBD. Nanoporous NiO thin films with high porosity showed excellent electrochromic properties, with transmittance change of 77% at 550 nm and coloration efficiency of 99.5 cm2/C. Electrochemical properties of these thin films were studied in a 0.1 M KOH electrolyte by cyclic voltammetry and chronoamperometry measurements. These nanoporous NiO thin films showed high porosity structure with excellent electro-reversibility. They are also very stable with long cyclic durability.
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