8 October 1999 Thermochromic properties of double-doped VO2 thin films fabricated from polyvanadate-based solutions
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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.
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Ikuya Takahashi, Mitsuhiro Hibino, Tetsuichi Kudo, "Thermochromic properties of double-doped VO2 thin films fabricated from polyvanadate-based solutions", Proc. SPIE 3788, Switchable Materials and Flat Panel Displays, (8 October 1999); doi: 10.1117/12.365785; https://doi.org/10.1117/12.365785
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