以高纯五氧化二钒(V2O5)粉末(纯度≥99.99%,质量百分比)为原料,采用真空蒸发——还原工艺,在不同退火温度下还原出不同组分的VOx薄膜。利用X射线衍射仪,X射线光电子能谱仪和紫外-可见分光光度计对薄膜进行测试和分析,得到了不同退火温度与薄膜结构和其光学特性的关系。结果显示:V2O5中的V^5+随着退火温度的上升被还原,退火温度为450℃时,V^4+含量最高,结晶最好,500℃时,薄膜组分表现出逆退火现象,温度进一步升高,钒再次被还原。
The V2O5 thin films were deposited by vacuum-evaporation technology from the V2O5 powder(purity≥99.99%,in mass). The V2O5 thin films were annealed at different temperature in the vacuum coating machine. Then the VOx thin films were gained. The thin films were measured by XRD, XPS and ultraviolet-visible spectrophotometer. The relationship between annealing temperature and structure and optical properties was obtained. V^5+ was deoxidized with the annealing temperature rising. At 450℃, the content of V^4+ was highest and crystallization was best. At 500℃, substrate diffusion became serious. The composition of the VOx thin films show counter annealing phenomenon. When the temperature further elevated V was deoxidized again.