In this work, the electrochromic and structural properties of NiO thin films prepared using optimized low value electrodeposition parameters were studied. The optimized parameters were deposition current density, molar concentration of nickel nitrate solution, and deposited charge density. The highest electrochromic characteristics corresponded to deposition parameters of -0.05 mA/cm² deposition current density, 0.02 M of Ni(NO₃)₂.6H₂O solution, and charge density of 80 mC/cm². For this optimized film, at 630 nm wavelength, the transmittance modulation ΔT was 76 %, the efficiency η was 19 cm²/C, the charge reversibility Q_c/Q_a was 97%, and a remarkable contrast ratio CR of 5.9. In addition, a good cycling stability was confirmed up to 900 cycles. Optimized NiO thin films were poorly crystallized exhibiting a nano-flake structure, high porosity, and homogeneity.

Conference Title

Symposium on Nanotechnology

Conference Country

Palestine

Conference Date

July 27, 2019 - June 28, 2019

Conference Sponsor

Palestine Academy for Science And Technology