Stabilization of the VO(M2) Phase and Change in Lattice Parameters at the Phase Transition Temperature of WVO Thin Films.

Various methods have been used to fabricate vanadium dioxide (VO) thin films exhibiting polymorph phases and an identical chemical formula suited to different applications. Most fabrication techniques require post-annealing to convert the amorphous VO thin film into the VO (M1) phase. In this study, we provide a temperature-dependent XRD analysis that confirms the change in lattice parameters responsible for the metal-to-insulator transition as the structure undergoes a monoclinic to the tetragonal phase transition.

Infrared optical properties modulation of VO thin film fabricated by ultrafast pulsed laser deposition for thermochromic smart window applications.

Over the years, vanadium dioxide, (VO(M1)), has been extensively utilised to fabricate thermochromic thin films with the focus on using external stimuli, such as heat, to modulate the visible through near-infrared transmittance for energy efficiency of buildings and indoor comfort. It is thus valuable to extend the study of thermochromic materials into the mid-infrared (MIR) wavelengths for applications such as smart radiative devices. On top of this, there are numerous challenges with synthesising pure VO (M1) thin films, as most fabrication techniques require the post-annealing of a deposited thin film to convert amorphous VO into a crystalline phase.