Paper Title:
Thermochromic VO2 Thin Film Prepared by Post Annealing Treatment of V2O5 Thin Film

Thermochromic vanadium dioxide (VO2) exhibits a semi-conducting to metallic phase transition at about 68°C, involving strong variations in electrical and optical properties. A simple method was proposed to prepare VO2 thin films from easily gained V2O5 thin films. The detailed thermodynamic calculation was done and the results show that V2O5 will decompose to VO2 when the post annealing temperature reaches 550°C at the atmospheric pressure of less than 0.06Pa. The initial V2O5 films were prepared by sol-gel method on fused-quartz substrates. Different post annealing conditions were studied. The derived VO2 thin film samples were characterized using X-ray diffraction and X-ray photoelectron spectroscopy. The electrical resistance and infrared emissivity of VO2 thin films under different temperatures were measured. The results show that the VO2 thin film derived from the V2O5 thin film annealed at 550°C for 10 hours is pure dioxide of vanadium without other valences. It was observed that the resistance of VO2 thin film with thickness about 600nm can change by 4 orders of magnitude and the 7.5-14μm emissivity can change by 0.6 during the phase transition.

Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
D. Q. Liu, W. W. Zheng, H. F. Cheng, H. T. Liu, "Thermochromic VO2 Thin Film Prepared by Post Annealing Treatment of V2O5 Thin Film", Advanced Materials Research, Vols. 79-82, pp. 747-750, 2009
Online since
August 2009
Authors: Seung Jae Moon
Abstract:The formation and growth mechanism of polysilicon grains in thin films via laser annealing of amorphous silicon thin films are studied. The...
Authors: Cong Wang, Xin Kang Du, Tian Min Wang
Abstract:A new cermet film Nb-NbN, deposited on the stainless steel substrate by direct reactive magnetron sputtering, was reported as solar...
Authors: Cecile Napierala, Mathieu Edely, Patrick Laffez, Laurent Sauques
Abstract:Nd0.3Sm0.7NiO3 ceramic has been synthesised using a sol-gel method and annealing at oxygen pressure. Nd0.3Sm0.7NiO3 exhibits a reversible...
Authors: Gao Yang Zhao, Xiao Zhi, Yang Ren, Tao Zhu
Abstract:In this paper, fluorine & antimony-doped tin oxide (FATO) transparent conductive thin films are deposited by Spray Pyrolysis on glass...
Authors: Gao Yang Zhao, Yang Ren, Yun Gao, Jie Shen
Abstract:SnO2:F transparent conductive thin films with the area of 500×500mm2 were deposited on glass substrates by spray pyrolysis using SnCl4•5H2O...