Abstract
Nanocrystalline Tungsten Oxide (WO3) samples having different average crystallite sizes 10nm, 11 nm, 22 nm and 26 nm were synthesized through controlled chemical precipitation method. The phase purity and average crystallite sizes were estimated from X-ray Diffraction (XRD) analysis. The vibrational characteristics of the samples were studied by Raman spectroscopy. The X-ray Photoelectron Spectroscopic (XPS) analysis of the samples revealed the presence of oxygen vacancies which was confirmed by the uv-visible (uv- vis) absorption and photoluminescence (PL) emission studies.
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