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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 quenching of Eu3 + luminescence in Y2 O3 nanocrystal was confirmed by the concentration quenching curve, and the exchange interaction was observed. The luminescence decay curve of 5 D0-7F2 transition of Eu3 + at two particle sizes was measured with the change of doping concentration, The theoretical decay curves were used to fit the experimental decay curve.The energy transfer efficiency of Eu3 + ion exchange interaction was calculated, and the difference between the energy transfer efficiency and the theoretical energy transfer efficiency of Eu3 + ions in Y2 O3 nanocrystals was analyzed.