MAl₂O₄:Eu²⁺、RE³⁺长余辉发光性质的研究

MAl 2 O 4 :Eu 2+ 、RE 3+ 长余辉发光性质的研究 LUMINESCENT PROPERTIES OF MAl 2 O 4 :Eu 2+ 、RE 3+ 张天之 Zhang Tianzhi first-author 苏锵 Su Qiang 王淑彬 Wang Shubin 中国科学院长春应用化学研究所, 稀土化学和物理开放研究室 长春,130022 中国科学院长春应用化学研究所, 稀土化学和物理开放研究室 长春,130022 Laboratory of Rare Earth Chemistry and Physics, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry Laboratory of Rare Earth Chemistry and Physics, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry 研究鳞石英结构碱土铝酸盐MAl 2 O 4 :Eu 2+ 、RE 3+ (M=Mg,Ca,Sr,Ba;RE=Y,La,Ce,Pr,Nd,Sm,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu)的荧光及长余辉发光性质。其发光由Eu 2+ 的4f-5d跃迁产生。RE 3+ 作为辅助激活离子,提供合适的陷阱能级。即使用RE 3+ 的特征波长激发,在MAl 2 O 4 :Eu 2+ 、RE 3+ 的发光中也观察不到RE 3+ 的发光。基于其荧光,热释光,X-射线,红外光谱等实验结果,分析这一结构对稀土发光的影响,并总结其发光规律. The luminescent and long phosphorescent properties of MAl 2 O 4 :Eu 2+ 、RE 3+ ( M =Mg, Ca, Sr, Ba;RE=Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) with distorted stuffed tridymite were researched. The luminescence attributed to the 4f 5d transition of Eu 2+ . The incorporation ofRE 3+ ion into the MAl 2 O 4 :Eu 2+ system was as the auxiliary activator which provided the proper trapping levels. We could not see the luminescence ofRE 3+ though excited with the characteristic excitation wavelength of RE 3+ . We analysed the luminescent and long phosphorescent properties of this type of host codoped with rare earths, and made the conclusion that Pr, Nd, Dy, Ho, Er could effectively prolong the life time of MAl 2 O 4 :Eu 2+ system. The long phosphorescent rule is Sr > Ca > > Ba. 稀土 荧光 热释发光 长余辉 陷阱 rare earth phosphorescence thermoluminescence long phosphorescence traps 1999-01-24 1999-05-30 2020-08-11 2 20