用溶胶-凝胶法制备了PDP用荧光粉LT-GdBO3:Eu，并用常规的手段，包括XRD、拉曼散射谱、发光光谱等研究了它的晶体结构和光谱性质。利用染料激光系统，选择激发荧光粉中不同格位上Eu3+的5D0能级，得到了对应于不同格位的两套发射谱，并根据发射谱分析了Eu3+的格位对称性，以及对这两种格位之间的能量传递过程产生影响的一些因素。在1000～1100℃之间，发生了LT-GdBO3向另一种Vaterite结构的GdBO3的相转变。相变的过程伴随着因GdBO3晶体结构发生重排而引起的热吸收。荧光粉LT-GdBO3:Eu有很高的亮度，同时其猝灭浓度高达20mol％。
The PDP phosphor, LT-GdBO3:Eu, was prepared by a sol-gel process. Some conventional experiments, such as XRD, Raman spectrum, and photoluminescence spectra, were given to study its crystal structure and optical properties. When a dye laser system was used, emissions from 5D0 levels of Eu3+ ions at two different sites were easily distinguished. The site symmetries were analyzed by the emission spectra, and factors that affectted the energy transfer were also investigated. When the sol-gel sample was sintered at 1100℃, a phase transition to the Vateritetype GdBO3 occured, with an absorption of heat which was mainly caused by the realignment of the lattice. The sol-gel samples had quite strong luminescent intensity. And, at the same time, the quenching concentration was as high as 20mo1%.
参考文献
| [1] | Holsa J. Inorgan. Chem. Acta, 1987, 139: 257-259. |
| [2] | Newnham R E, Redman M J, Santoro R P. J. Am. Ceram. Soc, 1963, 46: 253-256. |
| [3] | Bradley W F, Graf D L, Roth R S. Acta Crffstallogr. 1966, 20: 283-287. |
| [4] | Chadeyron G, El-Ghozzi M, et al. J. Solid State Chem, 1997, 128: 261-266. |
| [5] | Ren M, Lin J H. Dong Y, et al. Chem. Mater, 1999, 11: 1576-1580. |
| [6] | Holstein T, Lyo S K, Orbach R. Excitation Transfer in Disordered Systems, In: Laser Spectroscopy of Solids, ed. Yen W M, and Seizer P M. Topics in Applied Physics, Berlin, Heiderberg, New York:Springer-Verlag press, 1981, 49: 47. |
| [7] | Corbel G, Leblanc M, Antic-Fidancev E, et al. or. Alloys Compound, 1999, 287: 71-78. |
| [8] | Zhang Wei-Wei, Xie Ping-Bo, Zhang Wei-Ping, et al. Chinese J. Inorg. Mater, to be published in2001, 1. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%