Abstract
In the present task, Ti surface-doped VO2 films have been prepared by rapid thermal annealing of (ultra-thin)Ti/V metal films on plain glass in order to improve the unbalanced thermochromic properties of VO2 films. The samples were analyzed for composition, crystallinity, surface topography, and optical properties. As the Ti content increases, the surface particles become smaller and more uniform, resulting in a lower transition temperature of 44.9 °C and an extremely narrow hysteresis width of 2.36 °C. Meanwhile, a significant increase in luminous transmittance (from 28.4% to 39.6%) accompanies the optical band gap widening. The convenient method of surface engineering provides a new strategy for the performance optimization of smart windows.
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