Eu^(3+)掺杂ZnO粉体的制备及光学性能研究

Preparation and study on the optical performances of Eu^(3+)-doped zinc oxide powder

以氧化铕(Eu_2O_3)和氧化锌(ZnO)为原材料,采用固相合成法合成了Zn Eu O粉体。通过X射线衍射(XRD)、共焦显微拉曼仪、紫外-可见(Uv-vis)光谱仪、荧光分光光度计和扫描电子显微镜(SEM)对其结构和性能进行了表征,研究了Eu掺杂摩尔比(x)对粉体晶体结构和光学性能的影响。结果表明,所制备的粉体都保持了ZnO的六方纤锌矿结构。紫外-可见吸收光谱中,Eu的加入使得粉体在紫外区的吸光度减小,而在可见光区的吸光度增大。当Eu掺杂摩尔比x=0. 02时,Eu^(3+)能很好的进入到ZnO的晶格中取代Zn^(2+)的位置,粉体结构排列比较紧密,且具有良好的发光性能。

With europium oxide(Eu 2O 3)and zinc oxide(ZnO)as the raw materials,the ZnEuO powders were prepared by solid phase method.The structure and optical properties of the powders were characterized by X-ray diffraction(XRD),confocal Raman micro-spectrometer,ultraviolet-visible(Uv-vis)spectrometer,fluorescent spectrophotometer and scanning electron microscopy(SEM).And the impact of the Eu doping molar ratio(x)to the crystal structure and optical properties of the powder was studied in detail.The results showed that the preparation of the powders kept the wurtzite structure of ZnO.In the Uv-vis absorption spectra,the absorbance of the powders decreased in the ultraviolet region and increased in the visible region.As the Eu-doped molar ratio was x=0.02,the Eu 3+could be well integrated to the ZnO lattice by replacing the Zn 2+position,the powder structure was arranged closely and shown good photoluminescence properties