RT journal article
T1 A simple two-step approach to the fabrication of VO2-based coatings with unique thermochromic features for energy-efficient smart glazing
A1 Santos Izquierdo-Bueno, Antonio Jesús
A1 Martin, Nicolas
A1 Outón Porras, Javier
A1 Blanco Ollero, Eduardo
A1 García Roja, Rafael
A1 Morales Sánchez, Francisco Miguel
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
A2 Física de la Materia Condensada
K1 Vanadium dioxide
K1 Glancing angle deposition
K1 Rapid thermal annealing
K1 Thermochromism
K1 Metal-insulator transition
K1 Smart windows
AB Vanadium dioxide (VO2) is considered as one of the most promising materials for the next generation ofenergy-efficient smart glazing since it experiments a reversible metal-to-insulator transition at near roomtemperature. Nevertheless, the complexity and high cost associated to the fabrication of VO2-based nanostructureslimit the transfer of this technology to the industrial scale. Aware of this opportunity, we presenta simple and advantageous method for the fabrication of VO2 coatings on glass substrates which comprisesthe initial sputtering of vanadium thin films at glancing angles and the subsequent very fast oxidation ofsuch systems in open air atmosphere. Relying on the accurate control of the thermal treatment parameters,as well as the enhanced reactivity of the high surface-to-volume porous deposited structures, thermochromicVO2 coatings were achieved and then characterized by means of scanning electronmicroscopy, grazing incidence X-ray diffraction, variable temperature UV-vis-NIR spectrophotometry,and resistivity measurements. These investigations allowed us to determine the key role that oxidationtemperatures and times not only play in modulating the optical performance of the film, but also in thesurprising and advantageous decrease in the transition temperature (up to 12  C lower than the standardvalue for pure VO2), which is attained without incorporating doping agents. This fact, together with theremarkable values of luminous transmittance ( 50 %) and solar modulation ability (5–10 %) accomplishedfor our best samples, opens up an alternative and simpler pathway towards the large-scale manufacturingof VO2 coatings for smart window applications, reaching, on a preliminary basis, similar or even better performancesthan those obtained so far for single and undoped VO2 films.  2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND
PB ELSEVIER
SN 0378-7788
YR 2023
FD 2023
LK http://hdl.handle.net/10498/28063
UL http://hdl.handle.net/10498/28063
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026