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arXiv 2112.04582physics.opticsphysics.app-ph
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基于厚度依赖性refractive index的智能窗用VO2薄膜的精确设计

Precise design of VO2 thin films for smart windows by employing thickness dependent refractive index

Mohammad Hossein Mahdieh, Mehrad Sohrabi

摘要:

二氧化钒(VO 2)是一种折射率可调的材料,根据其温度,具有半导体或导体的性能。这种条件使其成为一种可用于制作热致变色智能窗的材料。这些类型的窗口的透射特性强烈地依赖于膜的厚度。因此,需要一些计算来优化VO 2厚度。不幸的是,VO 2薄膜的折射率是厚度相关的,因此,在计算来自VO 2薄膜的光谱的透射率时,不能利用唯一的折射率。在本文中,使用三个理论模型(洛伦兹-德鲁德振荡器,洛伦兹振荡器,和Tauc-Lorentz)和采用以前的报告的实验结果,我们提供了一个集合的厚度依赖的VO 2薄膜的折射率。利用这组折射率数据进行计算,可以得到更精确的透射率,计算结果与实验结果一致。这些结果也使我们能够为任何所需的传输性能确定最佳的膜厚。该方法可用于VO 2基热致变色智能窗的设计。

英文摘要:

Vanadium dioxide (VO2) is an adjustable refractive index material and has capability of behaving as semiconductor or conductor depending on its temperature. Such condition makes it as a material which can be employed in fabricating thermochromic smart windows. The transmission characteristics of these type of windows strongly depend on the thickness of the film. Therefore, some calculations are required to optimize the VO2 thickness. Unfortunately, refractive index of VO2 thin film is thickness dependent, therefore, in calculating the transmission of light spectrum from VO2 thin films, a unique refractive index cannot be utilized. In the present paper using three theoretical models (Lorentz-Drude oscillator, Lorentz oscillator, and Tauc-Lorentz) and employing experimental results from previous reports, we provide a collection of thickness dependent refractive index of VO2 films. More precise transmission can be achieved by using this set of refractive index data in the calculations which agree with those of experiments. These results also fairly make us capable to determine optimized film thickness for any desired transmission performance. This method is useful for design of VO2 based thermochromic smart windows.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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