Resumo

FLORES-MENA, J. E.; DIAZ-REYES, J.  e  BALDERAS-LOPEZ, J. A.. Structural properties of WO₃ dependent of the annealing temperature deposited by hot-filament metal oxide deposition. Rev. mex. fis. [online]. 2012, vol.58, n.6, pp.504-509. ISSN 0035-001X.

In this work presents a study of the effect of the annealing temperature on structural and optical properties of WO₃ that has been grown by hot-filament metal oxide deposition (HFMOD). The chemical stoichiometry was determined by X-ray Photoelectron Spectroscopy (XPS). By X-ray diffraction obtained that the as-deposited WO₃ films present mainly monoclinic crystalline phase. WO₃ optical band gap energy can be varied from 2.92 to 3.15 eV obtained by transmittance measurements by annealing WO₃ from 100 to 500°C. The Raman spectrum of the as-deposited WO₃ film shows four intense peaks that are typical Raman peaks of crystalline WO₃ (m-phase) that corresponds to the stretching vibrations of the bridging oxygen that are assigned to W-O stretching (v) and W-O bending (δ) modes, respectively, which enhanced and increased their intensity with the annealing temperature.

Palavras-chave : Electrochromic semiconductor; WO₃; physical properties.

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