-
摘要: 采用高温常压方法合成了稀土发光材料LaOBr:Tb3+，Dy3+，采用高温高压方法对材料进行了处理，研究了高温高压处理前后样品发光特性的变化，并进行了发光衰减测量。结果表明，Dy3+的掺杂可以将Tb3+的5D3能级的激发能有效地驰豫到5D4能级，从而使5D4~7FJ（J＝0, 1,,6）的发射，尤其是5D4~7F5的发射明显增强，使得样品的发光亮度大大提高。Dy3+，Tb3+间存在交叉驰豫共振能量传递。高压处理过程引入的杂质、材料氧化及压致晶场变化都对材料的发光特性产生影响。Abstract: The rare earth luminescence materials LaOBr:Tb3+, Dy3+ were synthesized at high temperature, and were treated by high pressure (HP) combined with high temperature (HT). The luminescent properties of the samples before and after HP and HT treatment were studied. The results show that codoping Dy3+ makes the luminescence strength increased greatly, and energy transfer takes place between Tb3+ and Dy3+.
-
Liu Hongjian, Wang Yifeng, Yang Jinghai, et al. J Alloys and Comp, 1993, 191: 1-4. 杨景海, 王一峰, 刘宏建, 等. 高压物理学报, 1989, 3(3): 198. 许伟, 苏文辉, 崔硕景, 等. 髙压物理学报, 1988, 2(3): 237. Holsa J, Leskela M, Nimista L. J Solid State Chem, 1981, 37: 267. 罗淑仪. 北京大学学报, 1981, 4: 51. Teruhvko Hoshina. Jpn J Appl Phys, 1967, 6(10): 1203. Dieke G H. Spectra and Energy Levels of Rare Earth Ions in Crystals. New York: John wiley, 1968. 石春山, 叶泽人. 发光与显示, 1982,(4): 1. Laveant Paul. Revne de Chimie minerale, 1973, 10: 329. Huber G. Phys Rew B, 1977, 15(11): 3248. -
计量
- 文章访问数: 7707
- HTML全文浏览量: 957
- PDF下载量: 690
下载:
