RT journal article
T1 Tracking the optical constants of porous vanadium dioxide thin films during metal-insulator transition: Influence of processing conditions on their application in smart glasses
A1 Outón Porras, Javier
A1 Blanco Ollero, Eduardo
A1 Bakkali, Hicham
A1 González Leal, Juan María
A1 Delgado Jaén, Juan José
A1 Ramírez del Solar, Milagrosa
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
A2 Física de la Materia Condensada
K1 Vanadium dioxide
K1 Thin film
K1 Thermochromism
K1 Smart window
K1 Metal–insulator transition
K1 Ellipsometry
AB Vanadium dioxide (VO2) is widely recognized as a thermochromic material with great potential for application in smart glazing for energy-efficient buildings. The monoclinic (M1) VO2 phase undergoes a first-order reversible phase transition from the semiconductor to the rutile metallic state. In this study, an M1 VO2 porous film was synthesized via a polymer-assisted sol-gel route. Processing parameters, such as drying and reduction temperatures, were varied to evaluate their influence on the thermochromic behavior of VO2 and to determine the necessary trade-off between a significant thermochromic effect and high luminous transmittance. Film-silica glass-film systems with luminous transmittance close to 80% and IR solar modulation ability as large as 20% were prepared. By tracking the optical constants of the films during the thermochromic process, the changes produced at the microscopic level in the material could be correlated with its macroscopic behavior when used as an energy-saving material.
PB ELSEVIER
SN 0169-4332
YR 2022
FD 2022
LK http://hdl.handle.net/10498/25991
UL http://hdl.handle.net/10498/25991
LA eng
NO Y J. Outon acknowledges the support by the Spanish Ministerio de Educacion y Cultura through grant FPU19-02638. M. Dominguez ac-knowledges the support by the Spanish Ministerio de Ciencia, Innovacion y Universidades under project EQC2018-004704-P. The authors thank the University of Cadiz and IMEYMAT for financing the mutual facilities available at the UCA R&D Central Services (SC-ICYT) and the IMEYMAT Institute project reference PLP2020335-1 respec-tively. The authors also acknowledge J. Gonzalez and F. Delgado for their assistance in the preparation of the STEM specimens.
DS Repositorio Institucional de la Universidad de Cádiz
RD 06-nov-2026