采用液相沉淀法合成Y2SiO5∶Ce3+,Tb3+发光材料.采用X射线粉末衍射仪(XRD)、扫描电镜(SEM)、荧光分光光度计以及国际照明委员会(CIE)色度坐标图对其相的组成、光谱学和发光特性进行了研究.Y2SiO5∶Tb3+激发光谱中存在较强的基质激发峰,在发射光谱中,发现Tb3+的5 D4→7FJ(J=6,5,4,3)跃迁,最大发射中心位于545nm(5D4→7F5跃迁).在Y2 SiO5∶Ce3+,Tb3+双掺体系中,Tb3+的发光强度随Ce3+的浓度增加而增强,存在Ce3+ →Tb3+能量传递,尤其是Tb3+的5D4→7F5跃迁发射显著增强,有望成为一种有发展前途的绿色荧光材料.
Ce/Tb co-doped Y2SiO5system luminescent material were prepared by the liquid phase method.The phase composition,spectroscopic characterizations and luminescence properties of the rare earth luminescence material were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM),fluorescent spectrometer and International Commission on Illumination (CIE) chromaticity.In Tb-doped Y2SiO5 system,there was strong matrix exciting peak in the excitation spectrum,while the transition from 5D4→7 FJ (J=6,5,4,3) of Tb3 + was found in the emission spectrum.The luminescence intensity of Tb3 + strengthened with the increase of the Ce3 + ion concentration in co-doped system of Y2SiO5.It was found that there was an effective energy transfer from Ce3+ to Tb3+ and especially the emission peaks ascribed to Tb3+ ions transition from 5D4→7F5 strengthened greatly in Y2SiO5.It was expected that the phosphor of Y2SiO5∶ Ce3+,Tb3+ would become a promising green-emitting fluorescent material.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%