期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：9
页码：4618
出版社：S&S Publications
摘要：Eu³⁺ doped rare earth ortho phosphates (rare earths = La, Y) have been prepared by solid state diffusionreaction method. The required starting materials were weighed and grounded by using mortar and pestle, fired at 1200oCfor 3 hours in a muffle furnace. Photoluminescence (PL) of the LaYPO₄ phosphor doped with Eu (0.5%) and Eu (0.5%,1.0%, 1.5%, 2.0%) : Gd 0.5% keeping Gd concentration constant are studied and presented in this paper. The producedphosphor materials were analyzed using XRD, PL, FTIR and SEM techniques. We have studied the effect of dopants onthe photoluminescence of LaYPO₄ phosphor under the excitation of 254nm wave length. PL properties of the samples arerecorded using Spectrofluorophotometer at room temperature. PL emission of LaYPO₄ doped with Eu (0.5%) phosphorshows peaks at 534, 586, 590, 597,612, 621 and 631 nm with good intensity alog with blue green region with lessintensity. PL emission of Eu (0.5%, 1.0%, 1.5%, 2.0%) : Gd 0.5% shows peaks at same wavelength of LaYPO₄ dopedwith Eu (0.5%) As the Eu concentration increases the PL intensity also increases up to Eu concentration 1.5%. For Euconcentration 2.0% the intensity slightly decreased.
