Thermochromic properties of double-doped VO2 thin films fabricated from polyvanadate-based solutions

Ikuya Takahashi; Mitsuhiro Hibino; Tetsuichi Kudo

doi:10.1117/12.365785

8 October 1999 Thermochromic properties of double-doped VO2 thin films fabricated from polyvanadate-based solutions

Ikuya Takahashi, Mitsuhiro Hibino, Tetsuichi Kudo

Proceedings Volume 3788, Switchable Materials and Flat Panel Displays; (1999) https://doi.org/10.1117/12.365785
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

V_l-x-yW_xTi_yO₂ (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 (W_h). In the case of doping with W and Ti for VO₂, both T_t and W_h were lowered. The rate (approximately 10 degree(s)C/at.%-W) of T_t-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.

Citation Download Citation

Ikuya Takahashi, Mitsuhiro Hibino, and 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); https://doi.org/10.1117/12.365785

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