Research demonstrates that interface layers affect transition temperature in VO2 thin films, indicating potential for improved thermal control applications.
Key Points
The study aims to investigate how metal oxide interface layers influence the thermochromic properties of VO2 thin films.
Deposited VO2 thin films using RF magnetron sputtering on Al-doped ZnO coated fused silica.
Utilized Al2O3, TiO2, and WO3 as interface layers to control transition temperature.
Applied annealing under nitrogen atmosphere to promote diffusion from the interface into the VO2 films.
Achieved a decrease in metal-to-insulator transition temperature from 68°C to 55°C.
Identified that matching crystalline structures and high oxygen flows during deposition increased doping/diffusion into VO2.
Noted that tuning oxygen flow rate during deposition on a WO3 interface layer significantly impacted properties.