Influence of Thermal Annealings in Argon on the Structural and Thermochromic Properties of MoO 3 Thin Films

M. A. Arvizu, M. Morales-Luna, M. Pérez-González, E. Campos-Gonzalez, O. Zelaya-Angel, S. A. Tomás

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10 Citations (Scopus)

Abstract

The effect of thermal annealing in an inert atmosphere (argon) on the structural and thermochromic properties of MoO 3 thin films was investigated. MoO 3 thin films were deposited by thermal evaporation in vacuum of MoO 3 powders. X-ray diffraction patterns of the films showed the presence of the monoclinic Magneli phase Mo 9O 26 for annealing temperatures above 250∘C. Absorbance spectra of the films annealed in argon indicated that their thermochromic response increases with the annealing temperature in the analyzed range (23 C –300 C), a result opposite to the case of thermal annealings in air, for which case the thermochromic response shows a maximum value around 200 C–225 C and decreases for higher temperatures. These results are explained in terms of a higher density of oxygen vacancies formed upon thermal treatments in inert atmospheres.

Original languageEnglish
Article number51
JournalInternational Journal of Thermophysics
Volume38
Issue number4
DOIs
Publication statusPublished - 1 Apr 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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