Abstract
The sol-gel dip-coating technique was used for depositing cubic spinel Co3O4 and amorphous Co/Al/Si-oxide thin films. Both types of films exhibit similar electrochrochemical properties which are accompanied by the hydration of the structure. The electrochromic properties of Co/Al/Si-oxide surpass those already known for Co-oxide based electrochromic materials. The change in transmittance for spinel Co3O4 is 25%, while for Co/Al/Si-oxide films exceeds 50%. The electrochromic efficiency (η) for Co3O4 and Co/Al/Si-oxide films was 22 cm2 C-1, which is comparable to other electrochromic oxides. Good electrochromic properties of the Co/Al/Si-oxide films make them promising materials for active counter electrode in electrochromic devices.
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