Thermochromic Properties of Double-Doped VO2 Thin Films Prepared by a Wet Coating Method Using Polyvanadate-Based Sols Containing W and Mo or W and Ti
| العنوان: | Thermochromic Properties of Double-Doped VO2 Thin Films Prepared by a Wet Coating Method Using Polyvanadate-Based Sols Containing W and Mo or W and Ti |
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| المؤلفون: | Ikuya Takahashi, Mitsuhiro Hibino, Tetsuichi Kudo |
| المصدر: | Japanese Journal of Applied Physics. 40:1391 |
| بيانات النشر: | IOP Publishing, 2001. |
| سنة النشر: | 2001 |
| مصطلحات موضوعية: | Materials science, Hydrogen, Dopant, Annealing (metallurgy), Inorganic chemistry, Doping, General Engineering, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Vanadium, Tungsten, chemistry, Molybdenum, Thin film |
| الوصف: | A mixture of metallic vanadium, tungsten and molybdenum powder was dissolved in a hydrogen peroxide solution, to yield a polyvanadate sol containing W and Mo. A thin film of V1-x-y W x Mo y O2 was fabricated on a fused silica substrate by spin-coating using such a sol followed by reduction in hydrogen and successive annealing in a nitrogen atmosphere. Thin films in the system V1-x-z W x Ti z O2 were similarly prepared using a sol containing W and Ti. All the films obtained in this study showed a clear thermochromic switching performance with a large transmittance change in the infrared region. For V1-x-y W x Mo y O2, the switching temperature (T t) was lowered by doping at approximately T t=T t0 (=67°C)-ax-by, where a and b are the decrease rates of each individual dopant (about 1920 and 870°C, respectively, for 0≦x, y≦0.03). Doping of Ti had little effect on T t, but markedly reduced hysteresis of the transition. We demonstrated that a double-doped film of V1-x-z W x Ti z O2 (x=0.018 and y=0.10) showed thermochromic switching almost without any hysteresis at a temperature as low as 45°C. |
| تدمد: | 1347-4065 0021-4922 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::c0297dc791a99de3186387271e0609b3 https://doi.org/10.1143/jjap.40.1391 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........c0297dc791a99de3186387271e0609b3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13474065 00214922 |
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