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Updated: Mar 1, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Visible Thermochromism in Vanadium Pentoxide Coatings
Sunil Kumar1, Awais Qadir1, Francis Maury2
1Luxembourg Institute of Science and Technology (LIST) , 5 avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
Abstract:
Although di-vanadium pentoxide (V2O5) has been a candidate of extensive research for over half a century, its intrinsic thermochromism has not been reported so far. Films of V2O5 grown on silicon, glass, and metal substrates by metal organic chemical vapor deposition in this study exhibit a thermally induced perceptible color change from bright yellow to deep orange. Temperature-dependent UV-vis spectroscopy and X-ray diffraction allow the correlation between the reversible continuous red shift of the absorption and the anisotropic thermal expansion along the (001) direction, that is, perpendicular to the sheets constituting the layered structure. Furthermore, the possibility of tuning the thermochromic behavior was demonstrated via a chemical doping with chromium.
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