Y_2O_3:Eu纳米晶中能量传递相互作用的研究  

STUDY OF ENERGY-TRANSFER INTERACTIONS BETWEEN Eu^(3+) IONS IN Y_2O_3 NANOCRYSTALS 

作　　者：李丹[1] 吕少哲[1] 陈宝玖[1] 王海宇[1] 唐波[1] 张家骅[1] 侯尚公[2] 黄世华[1] 

机构地区：[1]中国科学院激发态物理开放实验室,长春13002 [2]中国科学院长春光学精密机械与物理研究所,长春130021

出　　处：《物理学报》2001年第5期933-937,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展项目 (批准号 :G19980 613 0 9)&&

摘　　要：通过浓度猝灭曲线确定了引起Y2 O3纳米晶中Eu3+ 发光浓度猝灭的是交换相互作用 .测量了两种颗粒尺寸下Eu3+ 的5 D0 —7F2 跃迁发光衰减曲线随掺杂浓度的变化 ,利用交换相互作用的理论衰减曲线对实验衰减曲线进行拟合 .计算Eu3+ 离子的交换相互作用能量传递的效率 ,分析了Y2 O3纳米晶中Eu3+ 离子的能量传递效率和数值计算的理论能量传递效率的不同 .The exchange interaction is considered to play the dominant role in the quenching of D-5(0)-F-7(2) emission of Eu3+ in Y2O3 nanocrystals. Luminescence decay curves of D-5(0)-F-7(2) of Eu3+ in two sizes of nanocrystals were measured. We fit the luminescence decay curve by the Inokuti-Hirayama theory. The efficiencies of energy transfer of exchange interaction were calculated. The difference between theoretical and experimental curves of efficiency was analyzed.

关 键 词：能量传递 Y2O3:Eu纳米晶 归光衰减曲线 铕离子发光浓度猝灭 交换相互作用 能量传递效率 

分 类 号：O734[理学—晶体学]