The Studies of the Thermochromic V1-x-yWxAuyO2 Thin Films for the IR Gas Sensor

• Main Authors: Yan-cheng Liu, 劉彥澄
• Other Authors: Thomas C.-K. Yang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/79n4j6

碩士 === 國立臺北科技大學 === 化學工程研究所 === 96 === Thermochromic properties of vanadium dioxide thin films are applied to solar energy materials, photoeletric switch and bolometer materials for the uncooled microbolometers due to their high temperature coefficient of resistance (TCR) at room temperature. In this study, the doping of different amount of Au and W in VO2 was implemented to the optic and electric properties of VO2 thin film. The resistivity in difference temperature of the V1-x-yWxAuyO2 thin films were measured by a 4-point probe method. The surface morphology and structure was examined by AFM and XRD, respectively. The V1-x-yWxAuyO2 composite thin films characterized a switching temperature ranging from 30℃ to 70℃. The composite films doping with tungsten at molar mixing ratio (Wx+/V4+) of 0.02 show a sharp hysteresis loop, whereas the composite films doping with nano gold at volumetric mixing ratio (Auy+/V4+) of 0.10 show a narrow bandwidth of hysteresis loop. V1-x-yWxAuyO2 thin film has a low transition temperature and a narrow bandwidth of hysteresis loop which was applicable to bolometer materials for IR gas sensor.