Improved luminous transmittance and diminished yellow color in VO2 energy efficient smart thin films by Zn doping

Single pure M1-phase V1−xZnxO2 thin films with various Zn concentrations were fabricated on quartz glasses by reactive magnetron sputtering. Structural, morphological and optical properties of the prepared samples were characterized. Zn doping has a great effect on the morphology of V1−xZnxO2 thin films. Particularly, the luminous transmittance of V1−xZnxO2 films largely increased and the yellow color was significantly diminished as compared with pure VO2 films of the same thickness, which was due to the absorption-edge blueshift in the doped VO2 thin films. This feature benefits the application of VO2 thin films to energy efficient smart windows.

[1]  Yanfeng Gao,et al.  Enhanced chemical stability of VO2 nanoparticles by the formation of SiO2/VO2 core/shell structures and the application to transparent and flexible VO2-based composite foils with excellent thermochromic properties for solar heat control , 2012 .

[2]  Yanfeng Gao,et al.  Significant changes in phase-transition hysteresis for Ti-doped VO2 films prepared by polymer-assisted deposition , 2011 .

[3]  D. N. Basov,et al.  Electrodynamics of the vanadium oxides VO2 and V2O3 , 2008, 0803.2739.

[4]  L. Feldman,et al.  Size-dependent optical properties of VO2 nanoparticle arrays. , 2004, Physical review letters.

[5]  K. Parlinski,et al.  Electronic structure of cation-deficient CoO from first principles , 2008 .

[6]  Gang Xu,et al.  Design, formation and characterization of a novel multifunctional window with VO2 and TiO2 coatings , 2003 .

[7]  Jian Li,et al.  Anomalous optical switching and thermal hysteresis behaviors of VO2 films on glass substrate , 2011 .

[8]  Zongtao Zhang,et al.  Formation and metal-to-insulator transition properties of VO2–ZrV2O7 composite films by polymer-assisted deposition , 2011 .

[9]  Claes-Göran Granqvist,et al.  Mg doping of thermochromic VO2 films enhances the optical transmittance and decreases the metal-insulator transition temperature , 2009 .

[10]  Claes-Goeran Granqvist,et al.  Window coatings for the future , 1990 .

[11]  Yanfeng Gao,et al.  Nanoporous thermochromic VO(2) films with low optical constants, enhanced luminous transmittance and thermochromic properties. , 2011, ACS applied materials & interfaces.

[12]  F. J. Morin,et al.  Oxides Which Show a Metal-to-Insulator Transition at the Neel Temperature , 1959 .

[13]  C. N. Berglund,et al.  Optical Properties of V O 2 between 0.25 and 5 eV , 1968 .

[14]  Guoqiang Tan,et al.  VO2-based double-layered films for smart windows: Optical design, all-solution preparation and improved properties , 2011 .

[15]  Claes-Göran Granqvist,et al.  Thermochromic multilayer films of VO2 and TiO2 with enhanced transmittance , 2009 .

[16]  Gang Xu,et al.  Optimization of antireflection coating for VO2-based energy efficient window , 2004 .

[17]  L. Boeri,et al.  Optical properties of V 1 − x Cr x O 2 compounds under high pressure , 2008 .

[18]  Claes-Goeran Granqvist,et al.  Thermochromic sputter‐deposited vanadium oxyfluoride coatings with low luminous absorptance , 1989 .

[19]  I. Parkin,et al.  Atmospheric pressure chemical vapour deposition of VO2 and VO2/TiO2 films from the reaction of VOCl3, TiCl4 and water , 2004 .