RT journal article
T1 Atmospheric flash annealing of low-dimensional vanadium nanolayers sputtered on glass substrates
A1 Santos Izquierdo-Bueno, Antonio Jesús
A1 Martín, N.
A1 Outón Porras, Javier
A1 Casas Acuña, Andrea
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 Low-dimensional thin films
K1 Atmospheric flash annealing
K1 Thermochromic coatings
K1 Low transition temperature
K1 Smart windows
AB A simple approach to attain low-dimensional, highly transparent VO2-based thermochromic coatings on glass substrates is reported. This two-step procedure comprises the initial deposition of DC magnetron-sputtered vanadium films and the subsequent flash annealing of such layers in air atmosphere. The careful control of the thermal treatment parameters and characterizations carried out by scanning electron microscopy and variable temperature Vis-NIR spectrophotometry allowed the optimization of VO2 yields for 12.5 nm and 25 nm thick layers. The impact of layer thickness and the nature of the thermal treatment itself on the thermochromic features of such systems were also evaluated. In this sense, the resulting systems developed asymmetric transmittance vs. temperature hysteresis loops as well as a surprisingly advantageous lowering of the phase transition temperature, which is achieved without the incorporation of dopants. The most promising results were obtained for a 12.5 nm thick layer flash annealed at 475 degrees C, which, despite having a moderate solar modulation ability (similar to 2%), could be a potential candidate for smart windows applications given its high Vis-NIR transparency (> 60%) coupled with its low transition temperature of 16 degrees C below the standard value for pure VO2.
PB ELSEVIER
SN 2468-0230
YR 2022
FD 2022-11
LK http://hdl.handle.net/10498/27559
UL http://hdl.handle.net/10498/27559
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026