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Proceedings Paper

Thermochromic VO2 Films for Energy-Efficient Windows
Author(s): S. M. Babulanam; T. S. Eriksson; G. A. Niklasson; C. G. Granqvist
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Paper Abstract

VO2 films were produced by reactive e-beam evaporation followed by annealing post-treatment. Electrical measurements demonstrated a semiconductor-metal transition at Tc ~ 60°C. Spectrophotometry showed that the near-infrared solar transmittance was reduced when Tc was exceeded while the luminous transmittance remained relatively unchanged. This thermochromism may be utilized for regulating the energy throughput of windows. Practical application hinges on improved transmittance and on Tc-depression. These goals can be accomplished to some extent by dielectric overlayers, as verified by measurements on SiO2-coated VO2 films.

Paper Details

Date Published: 23 February 1987
PDF: 11 pages
Proc. SPIE 0692, Materials and Optics for Solar Energy Conversion and Advanced Lightning Technology, (23 February 1987); doi: 10.1117/12.936660
Show Author Affiliations
S. M. Babulanam, Chalmers University of Technology (Sweden)
T. S. Eriksson, Chalmers University of Technology (Sweden)
G. A. Niklasson, Chalmers University of Technology (Sweden)
C. G. Granqvist, Chalmers University of Technology (Sweden)


Published in SPIE Proceedings Vol. 0692:
Materials and Optics for Solar Energy Conversion and Advanced Lightning Technology
Sandor Holly; Carl M. Lampert, Editor(s)

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