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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 301-305 |
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Sohrabi M, Mahdieh M H. Vanadium dioxide film based smart windows – Investigation of thermochromics hysteresis transition with film thickness. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :301-305
URL: http://opsi.ir/article-1-2364-en.html
URL: http://opsi.ir/article-1-2364-en.html
1- Department of Physics, Iran University of Science and Technology, Narmak, Tehran, Iran
Abstract: (937 Views)
Vanadium dioxide (VO_2)is a material that with variation of temperature. Hence by variation the environment temperature induces impressive changes in optical properties of VO_2. Such characteristics of VO_2 makes it a good candidate for designing thermochromics smart windows. In this research, a polycrystalline VO_2 thin film was assumed to be coated on BK7 glass substrates and its semiconductor-conductor transition (hysteresis characteristics) was simulated numerically. In this study by using 5 different models, the relative thickness dependence of the hysteresis semiconductor-metal transition (SMT) characteristics were investigated. The results show that one of these models (Known as modified Maxwell Garnet theory) gives more accurate results at nanoscale thicknesses. The results of these investigations lead in optimization of the VO_2 thickness and its temperature dependence transmission spectrum.
Keywords: Vanadium dioxide, Semiconductor to metal transition, Effective medium theory, Boltzmann function distribution, Smart windows
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