单基质白光荧光粉Gd3PO7∶Dy3+的制备及其性能研究  

Preparation and Performance Study of Single-host White-emitting Phosphor GdPO∶Dy

作　　者：张玲 饶啟亮 郭海瑞 朱浩天 朱莉萍[3] 杨锦瑜[1,2] ZHANG Ling;RAO Qi-liang;GUO Hai-rui;ZHU Hao-tian;ZHU Li-ping;YANG Jin-yu(School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001,China;Key Laboratory for Functional Materials Chemistry of Guizhou Province,Guiyang 550001,China;School of Education,Guizhou Normal University,Guiyang 550001,China)

机构地区：[1]贵州师范大学化学与材料科学学院,贵州贵阳550001 [2]贵州省功能材料化学重点实验室,贵州贵阳550001 [3]贵州师范大学教育学院,贵州贵阳550001

出　　处：《稀有金属与硬质合金》2020年第5期41-47,54,共8页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金(213610007,51776046);贵州省科学技术基金资助项目(黔科合基础[2019]1229)。

摘　　要：采用湿化学法合成单基质的白光发射的Gd3PO7∶Dy^3+荧光粉,使用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)、荧光光谱等对样品的物相结构、形貌与光学性能等进行表征。XRD检测结果表明所制备的样品为含有微量杂质相的Dy^3+掺杂单斜结构的Gd3PO7晶体。荧光光谱检测结果表明在276 nm属于Gd^3+的特征激发带激发下,发射出Dy^3+的特征黄色光发射带(4F9/2→6H13/2)与蓝色光发射带(4F9/2→6H15/2),证实在Gd3PO7∶Dy^3+样品中出现了由Gd^3+到Dy^3+的能量传递现象。样品的发光强度随pH值和Dy^3+掺杂量的变化而变化,在pH值为6.00、Dy^3+掺杂量为0.5%的条件下制备的样品呈现相对更强的发光强度。Dy^3+掺杂量直接影响着Gd3PO7∶Dy^3+样品的发光颜色,当Dy^3+掺杂量为3%时所制备的Gd3PO7∶Dy^3+样品可发射出色坐标为(0.335,0.345)的白色光,这表明Gd3PO7∶Dy^3+是一种潜在的单基质白光发射荧光材料。Single-host white-emitting Gd3PO7∶Dy^3+ phosphor was synthesized by wet chemical method.The phase structure,morphologies and optical properties of the as-prepared samples were characterized by X-ray powder diffraction(XRD),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR),and fluorescence spectroscopy.The XRD results show that the samples are Dy^3+ doped Gd3PO7 crystals with monoclinic structure and slight impurity.The fluorescence spectra show that under the excitation with the characteristic excitation band of Gd^3+ ions at 276 nm,Gd3PO7∶Dy^3+ samples emit the characteristic emission bands of Dy^3+ ions in yellow light region(4F9/2→6H13/2) and blue light region(4F9/2→6H15/2),which indicates that the energy transfer from Gd^3+ to Dy^3+ occurs in the Gd3PO7∶Dy^3+matrix.The luminescence intensity of the samples depends on pH values and Dy^3+ dosage.When the pH value is 6.00 and the Dy^3+ dosage is 0.5%,the sample exhibits a relatively high luminescence intensity.The Dy^3+ dosage directly affects the luminescence color of Gd3PO7∶Dy^3+ samples,and the as-synthesized Gd3PO7∶Dy^3+ sample with 3% Dy^3+ can emit white light with the coordinate of(0.335,0.345),which indicates that Gd3PO7∶Dy^3+ is a potential single-host white-emitting phosphor.

关 键 词：Gd3PO7 单基质荧光粉 Dy3+掺杂 白光发射 能量传递 

分 类 号：O482.31[理学—固体物理]