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

doi:10.1007/s10765-017-2190-1

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 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 language	English
Article number	51
Journal	International Journal of Thermophysics
Volume	38
Issue number	4
DOIs	https://doi.org/10.1007/s10765-017-2190-1
Publication status	Published - 1 Apr 2017
Externally published	Yes

Bibliographical note

Funding Information:
The technical assistance of E. Ayala, M. Guerrero, and A. García is acknowledged. This work was partially supported by Consejo Nacional de Ciencia y Tecnologia (CONACyT) under Projects No. 168605 and 205733.

Publisher Copyright:
© 2017, Springer Science+Business Media New York.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Access to Document

10.1007/s10765-017-2190-1

Cite this

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

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.",

author = "Arvizu, {M. A.} and M. Morales-Luna and M. P{\'e}rez-Gonz{\'a}lez and E. Campos-Gonzalez and O. Zelaya-Angel and Tom{\'a}s, {S. A.}",

note = "Funding Information: The technical assistance of E. Ayala, M. Guerrero, and A. Garc{\'i}a is acknowledged. This work was partially supported by Consejo Nacional de Ciencia y Tecnologia (CONACyT) under Projects No. 168605 and 205733. Publisher Copyright: {\textcopyright} 2017, Springer Science+Business Media New York.",

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AU - Arvizu, M. A.

AU - Morales-Luna, M.

AU - Pérez-González, M.

AU - Campos-Gonzalez, E.

AU - Zelaya-Angel, O.

AU - Tomás, S. A.

N1 - Funding Information: The technical assistance of E. Ayala, M. Guerrero, and A. García is acknowledged. This work was partially supported by Consejo Nacional de Ciencia y Tecnologia (CONACyT) under Projects No. 168605 and 205733. Publisher Copyright: © 2017, Springer Science+Business Media New York.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - 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.

AB - 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.

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