Synthesis and Luminescent Properties of Nano-scale Y2Si2O7：Re^3＋ （Re=Eu, Tb） Phosphors via Sol-Gel Method  

作　　者：Yong Li Bao-gui You Wei Zhao Wei-ping Zhang Min Yin 

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230025, China [2]Department of Physics, University of Science and Technology of China, Hefei 230025, China

出　　处：《Chinese Journal of Chemical Physics》2008年第4期376-380,共5页化学物理学报（英文）

摘　　要：By using metal nitrates as starting materials and citric acid as a complexing agent, Y2Si207：Re3＋ （Re=Eu, Tb） phosphors were prepared by a sol-gel method. X-ray diffraction was employed to characterize the resulting samples. The results of XRD indicate that the α-Y2Si2O7 nanocrystal with size of 27 nm is obtained at 1000 ℃ and the doping ion content does not influence the structure. The excitation spectra in the UV and VUV ranges and the emission spectra of Re^3＋ doped samples were measured. The excitation spectra in the VUV range is due to absorption of host, that in the UV range is ascribed to absorption transitions from 4f to 5d state of the Tb^3＋ and the charge transfer in the En^3＋-O^2- bond. The spectral energy distribution of the Tb^3＋ emission depends strongly on the Tb3＋ concentration. The dependence of photolumineseenee intensity on Re^3＋ concentration is also discussed in detail. The fluorescent decay curves at room temperature were measured and analyzed.

关 键 词：Luminescence Sol-gel Y2Si2O7 Rare earth 

分 类 号：TN104.3[电子电信—物理电子学] TQ574[化学工程—精细化工]