近紫外激发单一白光荧光粉Sr_3Y_2(GeO_4)_3∶Dy^(3+)的制备及其发光特性  

Preparation of the single emitting phosphor Sr_3Y_2(GeO_4)_3∶Dy^(3+) and its luminescence property

作　　者：王桂美[1] 施伟梅[2] 江晓芬[1] 孙薇[1] 高绍康[1] 

机构地区：[1]福州大学化学化工学院,福建福州350108 [2]赣南医学院药学院,江西赣州341000

出　　处：《福州大学学报（自然科学版）》2010年第3期442-445,共4页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省教育厅科研资助项目(JB05017)

摘　　要：采用高温固相法制备了Sr3Y2(GeO4)3∶Dy3+荧光粉,利用X射线粉末衍射、荧光光谱等分析手段对荧光粉样品进行了表征,分析了其发光特性.讨论了Dy3+离子掺杂浓度以及添加不同助熔剂对Sr3Y2(GeO4)3∶Dy3+荧光粉发光强度的影响,并计算了发光材料的色坐标.研究结果表明,样品在388nm近紫外光激发下发射出强烈的蓝光(481nm)和黄光(573nm);Dy3+浓度影响其发光强度,随着Dy3+浓度的增大,荧光强度增强明显,色坐标越接近纯白光色坐标(0.33,0.33);当Dy3+浓度达到12%时,样品的荧光强度最强,色坐标为(0.32,0.33).The Sr3Y2（GeO4）3∶Dy3＋ phosphor was synthesized by high temperature solid-state method.X-ray diffraction（XRD）,photoluminescence excitation and emission spectra were used to characterize the Sr3Y2（GeO4）3∶Dy3＋ phosphor,and CIE chromaticity coordinate of Sr3Y2（GeO4）3∶Dy3＋ was calculated.The effect of the doped-Dy3＋ concentration on the emission intensity of Sr3Y2（GeO4）3∶Dy3＋ phosphor was investigated.The results show that the emission intensity increases with increasing Dy3＋ concentration until a maximum intensity is reached at x=12 mol%,and the chromaticity coordinate（0.32,0.33）.The fluorescence spectra of Sr3Y2（GeO4）3∶Dy3＋ with different fluxes were also discussed.

关 键 词：Sr3Y2(GeO4)3∶Dy3+ 光谱性质 荧光粉 制备 

分 类 号：O614.342[理学—无机化学] O644.11[理学—化学]