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Yb3+,Er3+掺杂的SrAl2O4:Eu2+,Dy3+长余辉材料的发光特性
引用本文:郝洪辰,陈斌,朱江,陆明.Yb3+,Er3+掺杂的SrAl2O4:Eu2+,Dy3+长余辉材料的发光特性[J].发光学报,2011,32(4):319-324.
作者姓名:郝洪辰  陈斌  朱江  陆明
作者单位:1. 复旦大学 光科学与工程系, 上海 200433; 2. 复旦大学 物理系, 上海 200433
基金项目:复旦大学曦源计划资助项目
摘    要:根据Dorenbos能级模型的推论,利用掺杂Yb3+和Er3+对典型的长余辉材料SrAl2O4:Eu2+,Dy3+(简称SAO:ED)的发光特性(发光强度和余辉时间)进行调制.在发光特性分析中,发展并使用了一种简便易行的解析模型,而不是常用的多项e指数衰减函数的经验模型.研究发现,正如Dorenbos所预言的,Yb+3...

关 键 词:长余辉材料  发光衰减  掺杂  铝酸锶
收稿时间:2010-09-03

Long-persistent Luminescent Properties of SrAl2O4∶Eu2+,Dy3+ Doped with Yb3+ and Er3+
HAO Hong-chen,CHEN Bin,ZHU Jiang,LU Ming.Long-persistent Luminescent Properties of SrAl2O4∶Eu2+,Dy3+ Doped with Yb3+ and Er3+[J].Chinese Journal of Luminescence,2011,32(4):319-324.
Authors:HAO Hong-chen  CHEN Bin  ZHU Jiang  LU Ming
Institution:1. Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; 2. Department of Physics, Fudan University, Shanghai 200433, China
Abstract:The long-persistent properties of the phosphor SrAl2O4 ∶ Eu2+,Dy3+ (or SAO ∶ ED) have been modulated by doping with Yb3+ or/and Er3+ according to the energy-level model proposed recently by Dorenbos. To analyze the decay process, we use a new developed analytical model instead of the usually adopted empirical one. The decay curves have been analyzed by this model. It is found that the doped Yb3+ does enhance the light-emitting intensity of SAO ∶ ED as predicted by Dorenbos, yet it acts not as a light-emitting center, but as an auxiliary excitation center. In consistent with Dorenbos' prediction, the doped Er3+ does act as a trap center. But when SAO ∶ ED is co-doped with Er3+ and Yb3+, Er3+ plays a role,which exerts an effect of re-trapping, increases the initial light-emitting intensity and reduces the decay time, but the figure of merit of light-emitting does not change significantly.
Keywords:long-persistent phosphor  decay curve  doping  SrAl2O4  
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