发光学报2011，Vol.32Issue(4)：319-324,6.DOI:10.3788/fgxb20113204.0319
Yb3+,Er3+掺杂的SrAl2O4:Eu2+,Dy3+长余辉材料的发光特性
Long-persistent Luminescent Properties of SrAl204: Eu2 +, Dy3 + Doped with Yb3 + and Er3 +
摘要
Abstract
The long-persistent properties of the phosphor SrAI2 O4: 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 lightemitting does not change significantly.关键词
长余辉材料/发光衰减/掺杂/铝酸锶Key words
long-persistent phosphor/ decay eurve/ doping/ SrAl2O4分类
数理科学引用本文复制引用
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):319-324,6.基金项目
复旦大学曦源计划资助项目 （）
