Abstract
In this paper, we report on rf power induced change in structural, optical, vibrational and electrochromic properties of radio frequency (rf) magnetron sputtered mixed Nb2O5:MoO3 (95:5) films. X-ray diffraction result showed that all the deposited films belong to amorphous nature. The presence of five-valent niobium and six-valent molybdenum in the deposited film was confirmed by the x-ray photoelectron spectroscopic measurement. The maximum average optical transmittance of 76% was observed for the film deposited at 100W rf power. The decrease in optical energy band gap may be due to the rf power induced effect gives rise to the localized state near the band edges of Nb2O5:MoO3. The longitudinal and transverse optic modes of Nb–O stretching vibrations were observed from the micro-Raman study. The cyclic voltammograms of Li+ and H+ ions clearly show all the films are having better reversibility and reproducibility in their electrochemical analysis. The maximum coloration efficiency of 69.80cm2/C was obtained for the mixed Nb2O5:MoO3 films.
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