掺杂型BaFBr:Eu^(2+)的热释发光性质的研究  

Property of Thermal Luminescence in BaFBr:Eu2+ Doped Metal Ions

作　　者：余华[1] 熊光楠[1] 朱汇[1] 高素华[1] 王世铭[1] 李岩[1] 

机构地区：[1]天津理工学院材料物理研究所,天津300191

出　　处：《光学学报》2002年第12期1497-1500,共4页Acta Optica Sinica

基　　金：国家自然科学基金(69677015);天津市科委重大攻关项目基金(013180611);天津市重点学科专项基金

摘　　要：BaFBr:Eu^(2+)是利用色心存储电子-空穴对并用可见光激励读出存储信息(产生Eu^(2+)的4f^65d→4f^7的跃迁)的优良的光激励发光材料。通过热释发光技术研究了BaFBr:Eu^(2+)的热激活行为,对其低温段和高温段的热释发光峰分别进行了归属。通过对BaFBr:Eu^(2+)以及掺杂Na^+或Al^(3+)的BaFBr:Eu^(2+)的热释发光(TL)谱和光激励发光(PSL)谱的表征,指出在BaFBr:Eu^(2+)中掺杂Na^+或AL^(3+)影响了F(Br^-)色心,使其陷阱深度变浅,并从理论上加以计算,得出的热致激发能量的变化与光致激发能量的变化能很好地吻合。BaFBr:Eu2+ is good photostimulated luminescent material, which makes use of colour center storage energy and stimulating energy with visible light. The thermal activation of BaFBr :Eu2+ is studied by thermal luminescence experiment. Through spectra of thermal luminescence (TL) and photostimulated luminescence (PSL), the phenomenon shows that doping metal ions influence F(Br- ) center in BaFBr: Eu2+ and make trap depth of F(Br- ) center shallow. A variety of F(Br ) center's trap depth of BaFBr:Eu2 + and BaFBr :Eu2+ doped metal ions is calculated in theory. The results indicate that the variety of trap depth confirm each other in thermal and photo-excitation.

关 键 词：BAFBR:EU^2+ 热释发光 光激励发光 色心 铕(Ⅱ) 稀土掺杂 氟溴化钡 

分 类 号：O614.233[理学—无机化学] O48[理学—化学]