稀土离子掺杂对长余辉发光玻璃发光性能的影响

Effects of Co-Doped Rare Earths Ions on Luminescent Properties of Long-Lasting Luminescent Glasses

选择制备了系列Eu2+,Dy3+共掺杂的硼铝酸锶长余辉发光玻璃。利用发光光谱、余辉衰减曲线、热释光谱系统研究了稀土离子掺杂对长余辉玻璃发光性能的影响。研究结果表明,不同掺量组合的Eu2+及Dy3+对长余辉玻璃发光性能有不同影响,在Eu2+及Dy3+掺量比为1∶1(摩尔比)的情形下,随Eu2+离子掺量的增多,发光性能下降;在Eu2+及Dy3+掺量比为1∶2的情形下,随Eu2+离子掺量的增多,发光性能增强。在此实验基础上,围绕缺陷形态及其与稀土离子间的能量传递,提出了可能的长余辉机制。

The series of glasses co-doped with Eu^2＋ and Dy^3＋ were prepared. The luminescent properties were investigated by means of emission spectra, phosphorescence decay curve and thermal luminescence spectra. The results show that different Eu^2＋and Dy^3＋ mixing compositions exert different influences on the luminescent properties. When the mixing ratio of Eu^2＋ and Dy^3＋ is 1：1 （mole ratio）, the luminescent proper-ties decrease with the increase of Eu^2＋ content. When the Eu^2＋ and Dy^3＋ mixing ratio is 1 ： 2 （mole ratio）, the luminescent properties increase with the increase of Eu^2＋ content. On the basis of the experiment re suits, around the defects formation transfer between their and rare earths ble mechanisms were discussed. and the energy ions, the possible mechanisms were discussed.