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Proceedings Paper

Thermochromic properties of double-doped VO2 thin films fabricated from polyvanadate-based solutions
Author(s): Ikuya Takahashi; Mitsuhiro Hibino; Tetsuichi Kudo
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Paper Abstract

Vl-x-yWxTiyO2 (0 < x < 0.02, y equals 0.03, 0.10) thin films were fabricated by spin-coating of polyoxometalate solution and successive thermal treatment in a reduction atmosphere. We investigated the films' thermochromic properties by measuring absorbance as a function of temperature. The film thus obtained had good thermochromic properties with large absorbance changes in the infrared region. Doping with Ti for VO2 raised the transition temperature (T1) and reduced the width of the hysteresis loop (Wh). In the case of doping with W and Ti for VO2, both Tt and Wh were lowered. The rate (approximately 10 degree(s)C/at.%-W) of Tt-lowering by W-doping in a W-Ti-doped sample become smaller than that (18 degree(s)C/at.%-W) in a W-doped sample, which seems to be caused by the coexistence of W and Ti.

Paper Details

Date Published: 8 October 1999
PDF: 8 pages
Proc. SPIE 3788, Switchable Materials and Flat Panel Displays, (8 October 1999); doi: 10.1117/12.365785
Show Author Affiliations
Ikuya Takahashi, Univ. of Tokyo (Japan)
Mitsuhiro Hibino, Univ. of Tokyo (Japan)
Tetsuichi Kudo, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 3788:
Switchable Materials and Flat Panel Displays
Carl M. Lampert, Editor(s)

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