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TitleThermochromic properties of vanadium oxide films prepared by dc reactive magnetron sputtering
Author(s)Cui, Hai-Ning
Teixeira, Vasco M. P.
Meng Lijian
Wang, Rong
Gao, Jin-Yue
Fortunato, E.
KeywordsVanadium oxide films
Termochromic property
DC magnetron sputtering
thermochromic property
Issue date15-Feb-2008
JournalThin Solid Films
Abstract(s)A transparent vanadium oxide film has been one of the most studied electrochromic (EC) and Thermochromic (TC) materials. Vanadium oxide films were deposited at different substrate temperatures up to 400 °Cand different ratios of the oxygen partial pressure (PO2). SEM,AFMand X-ray diffraction's results show detail structure data of the films. IR mode assignments of the films measured by IR reflection–absorbance in NGIA (near grazing incidence angle) are given. It is found that the film has V2O5 and VO2 combined structures. The films exhibit clear changes in transmittance when the environment temperature (Te) is varied, especially in the 3600–4000 cm−1 range. Applying a Te that is higher than a critical temperature (Tc) to the samples, the as-RT (room temperature) deposited film with 9% PO2 has a transmittance variation of 30%, but the films that were deposited on a heated substrate of 400 °C have little variation. There is tendency of bigger variation in transmittance for the sample deposited at a larger PO2, when it is applied by 200 °C Te.
Publisher version
AccessOpen access
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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