【摘要】 采用溶胶凝胶法合成稀土离子掺杂Ca Y_1-xAl O₄∶xRE³⁺（RE=Dy,Ho,Sm,Tm）荧光粉。采用X射线粉末衍射仪（XRD）、高分辨率透射电镜（TEM）和荧光分光光度计（PL）分别对荧光粉的物相结构、形貌以及荧光性能进行表征。研究结果表明,所合成样品为四方晶系结构的纳米级材料,在紫外光激发下,掺杂离子均表现出特征的f-f电子跃迁发射,当Dy³⁺、Ho³⁺、Sm³⁺和Tm³⁺的掺杂摩尔分数分别为0.03,0.015,0.015,0.02时,样品发光强度最大,分别发射出白光、绿光、橙光和蓝光。更多还原

【Abstract】 A series of phosphors Ca Y_1-xAl O₄∶xRE³⁺（RE=Dy,Ho,Sm,Tm）were synthesized by sol-gel method.X-ray powder diffraction（XRD）,high resolution transmission electron microscopy（TEM）and fluorescence spectrophotometer were utilized to characterize the samples on phase structure,morphology and fluorescence properties,respectively.The results show that the synthesized samples are nanometer material with tetragonal crystal structure.Under UV light excitation,the doped rare earth ions exhibit f-f feature level transitions.The doped ions give the strongest emission when the doped mole fraction（x）of Dy³⁺,Ho³⁺,Sm³⁺and Tm³⁺is 0.03,0.015,0.015 and0.02,and give white,green,orange and blue emission,respectively.更多还原