Effects of preparation conditions and thermocoloration on the optical properties of thin films of molybdenum oxide

Thin films of molybdenum oxide were prepared by thermal evaporation. The effects of the preparation conditions (substrate temperature and oxygen partial pressure) on the optical constants ( n and k) were studied. It was found that the optical constants increased with increasing substrate temperature...

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Bibliographic Details
Published in:Thin solid films 2002-04, Vol.408 (1), p.188-193
Main Authors: Al-Kuhaili, M.F., Durrani, S.M.A., Khawaja, E.E.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Insulators
Molybdenum oxide
Optical properties
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Optical properties of specific thin films
Physics
Thermooptical and photothermal effects
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Summary:Thin films of molybdenum oxide were prepared by thermal evaporation. The effects of the preparation conditions (substrate temperature and oxygen partial pressure) on the optical constants ( n and k) were studied. It was found that the optical constants increased with increasing substrate temperature and they decreased with the introduction of oxygen into the deposition chamber. Thermocoloration of the films was carried out by annealing them in vacuum. The annealing of the films produced significant changes in the transmittance of the films, and thus, in their optical constants. These changes resulted from the observed changes in film thickness and atomic oxygen-to-molybdenum ratio in the films.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(02)00138-4