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利用FESEM,XRD和紫外可见分光光度计研究了强磁场作用时间对真空蒸发氧化法制备的Co掺杂ZnO薄膜微观结构和光学性能的影响.结果表明:强磁场抑制了ZnO珊瑚枝状形貌的生长,氧化60 min时,无磁场下生长成球状颗粒,而6 T磁场下则生长成片状组织.强磁场作用时间的增加会使薄膜的择优生长从(101)变成(002);影响磁性Co原子在ZnO中的分布;薄膜的禁带宽度降低到2.95~3.13 e V的范围内.另外,无磁场时氧化时间的增加会降低薄膜的透光率,而强磁场下氧化时间的增加会提高透光率.这些研究结果为ZnO薄膜表面形貌、择优生长、磁性原子分布、透光率和禁带宽度等微观结构和光学性能的调控提供了一种新方法.
The effect of strong magnetic field on the microstructure and optical properties of Co-doped ZnO thin films prepared by vacuum evaporation oxidation was studied by FESEM, XRD and UV-Vis spectrophotometer. The results showed that strong magnetic field inhibited the dendritic morphology of ZnO coral When grown and oxidized for 60 min, they grow into spherical particles without magnetic field and grow into flaky tissues under the magnetic field of 6 T. The preferential growth of the film changes from (101) to (002) when the magnetic field is applied for a long time. The distribution of magnetic Co atoms in ZnO is reduced.The band gap of the film is reduced to the range of 2.95-3.13 e V. In addition, the increase of the oxidation time in the absence of a magnetic field will reduce the light transmittance of the film, while the increase of the oxidation time in a strong magnetic field These results provide a new method for the control of the microstructure and optical properties of ZnO films such as surface morphology, preferred growth, magnetic atom distribution, transmittance and band gap.