钬掺杂对SrAl_2O_4∶Eu^(2+),Dy^(3+)发光性能的影响  

Modification of optical properties of SrAl_2O_4∶Eu^(2+),Dy^(3+) phosphor by Ho^(3+) doping

作　　者：陈仁[1] 王银海[1] 胡义华[1] 

机构地区：[1]广东工业大学物理光电工程学院,广东广州510006

出　　处：《功能材料》2009年第6期888-891,895,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20671022;20871033)

摘　　要：首次研究了Ho3+掺杂对SrAl2O4∶Eu2+,Dy3+发光性能的影响。采用燃烧合成方法,在600℃条件下,合成Ho3+掺杂的SrAl2O4∶Eu2+,Dy3+新型长余辉光致发光材料。X射线衍射分析结果表明,合成的样品为单相SrAl2O4单斜晶系磷石英结构。光致发光光谱测量显示,合成样品的发射光谱是连续宽带谱,峰值位于510nm左右,激发光谱是单峰且峰值位于356nm的连续宽带谱。利用单光子计数系统测量了材料的余辉衰减曲线,结果显示Ho3+的适量掺杂可以明显提高铝酸锶的初始发光亮度。当Ho3+的掺入摩尔比例为0.005时,初始亮度是不掺杂Ho3+时的两倍多。对初始亮度增强的机理做了初步的探讨。The modification of optical properties of SrAl2O4：Eu^2＋,Dy^3＋ phosphor by holmium doping was studied for the first time. The phosphor by holmium doping was synthesized by the combustion method at the temperature of 600℃. X-ray diffraction pattern indicates that the samples possess a monoclinic crystal structure. The emission spectra shows a continuous luminescence band with a peak position near to 510nm and excitation spectra shows only a peak at 356nm. The intensity decay curves were measured by a single photon counter. The results show the initial intensity and decay time can be modified by holmium doping. Meanwhile, the possible mechanism for the improvement of initial intensity was presented here.

关 键 词：燃烧法 长余辉 SRAL2O4:EU^2+ DY^3+ 钬掺杂 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]