发光学报2017，Vol.38Issue(9)：1143-1148,6.DOI:10.3788/fgxb20173809.1143
Li+ 掺杂Sr2MgSi2O7∶Eu2+,Dy3+ 长余辉材料的发光性能
Luminescent Properties of Li+ doped Sr2MgSi2O7∶Eu2+,Dy3+ Phosphors
摘要
Abstract
Sr2MgSi2O7∶Eu2+,Dy3+and Sr2MgSi2O7∶Eu2+,Dy3+,Li+ phosphors were prepared by conventional solid state reaction method, and the influence of Li+ doping on the luminescent properties of Sr2MgSi2O7∶Eu2+,Dy3+ phosphors was studied.The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), decay curves, and thermoluminescence (TL).The results indicate that the incorporation of Li+ions has no influence on the position of the emission peak which is determined by 4f7→4f65d1 of Eu2+, while it has relationships with the intensity of the emission and the afterglow.The highest phosphorescent intensity was observed with 2.5% of Li+, and compared with the undoped sample, the phosphorescent intensity and the decay constant were increased by 1.5 and 1.6 times, respectively.By the characteristic of TL measurement, the number and the depth of trap level were analyzed.The doping of Li+ can increase the number of oxygen vacancies and increase the trap depth, so as to improve the afterglow properties of phosphor.关键词
Sr2MgSi2O7∶Eu2+,Dy3+/Li+离子/发光性能Key words
Sr2MgSi2O7∶Eu2+/Dy3+/lithium ion/luminescent properties分类
数理科学引用本文复制引用
肖玲,周建,刘桂珍..Li+ 掺杂Sr2MgSi2O7∶Eu2+,Dy3+ 长余辉材料的发光性能[J].发光学报,2017,38(9):1143-1148,6.基金项目
国家自然科学基金(51172175,51072147) （51172175,51072147）
广东省中山市重大科技专项(2014A2FC222)资助项目Supported by National Natural Science Foundation (51172175,51072147) （2014A2FC222）
Science and Technology Special Project of Zhongshan City(2014A2FC222) （2014A2FC222）
