Effects of addition of tungsten chloride on optical properties of VO₂-based thermochromic films prepared by sol-gel method

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• 作者：Yuankai Liu ; Haizheng Tao ; Xinhong Chu ; Meinan Wan ; Jianhua Bao ; Xiujian Zhao
• 关键词：VO2 ; WCl6 ; Sol&ndash ; gel method ; Thermal hysteresis loop ; The thermochromic properties ; Smart window
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 January, 2014
• 年：2014
• 卷：383
• 期：Complete
• 页码：116-120
• 全文大小：1536 K

文摘

Based on the thermochromic properties of VO₂, wide applications such as smart windows have been investigated in the world. Using the sol-gel method, series of thermochromic films, including the pure and W-doped VO₂ films, were fabricated on quartz substrate. WCl₆ was used as the source of tungsten. Measurements of temperature dependent transmitting spectra indicated that obvious enhancement of transmitting variance between 30 and 90 掳C can be realized through the addition of tungsten. In addition, based on the comparison of thermal hysteresis loops of the W-doped and undoped thermochromic films, the sharpening of temperature width and steepening of temperature-transmittance curves can be clearly seen from the W-doped thermochromic films, which indicated the improved phase change quality compared with the undoped ones. Therefore, the improvement of phase change quality has been realized successfully through the addition of tungsten compound into the thermochromic VO₂ films.