CHARACTERIZATION OF OPTICAL PROPERTIES OF VANADIUM-OXIDE THERMOCHROMIC FILMS
Energy saving of buildings is very important to reduce consumption of fossil fuels and to protect environments for human beings. Windows in the building envelope play an important role in energy savings and therefore, many new techniques have been developed for windows. Double glazed units and low-emission coatings can be applied to windows to reduce heat transfer between indoors and surroundings. However, the scenario of energy saving from the aspect of windows is deferent in summer and winter. It is difficult to find appropriate materials which can satisfy the various requirements. Vanadium oxide is one promising material which can be applied into windows. If temperature is high, vanadium oxide can form a metal phase and the reflectance of infrared radiation increase. If temperature is low, vanadium oxide can go back to its original semiconductor phase and the reflectance decreases. Moreover, the phase-changing temperature can be tuned by doped materials. In this work, the transmittance of vanadium-oxide films in the visible spectrum and infrared spectrum are measured at different temperatures. The averaged transmittances in the infrared spectrum before and after phase change are analyzed. Furthermore, the angular-resolved intensity of the thin film is characterized at several wavelengths. Effects of temperature, polar angle, and incidence polarization are discussed.
Vanadium dioxide Optical Properties BTDF Thermochromic
Qunzhi Zhu Haoyang Shi Yun Cui Yanfeng Gao Litao Kang
School of Energy and Environment Engineering Shanghai University of Electric Power 2103 Ping Liang R Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Ding Xi Road, Shanghai 200050, China
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
537-541
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）