Research of Three-Dimensional Fluorescence Spectra of RE3+ (RE=Eu, Tb) and Na2WO4 Co-doped Silica Luminescence Materials
来源期刊：JOURNAL OF RARE EARTHS2007年增刊第1期
论文作者：Li Xia Wang Xigui Wu Hongying
Key words：three-dimensional fluorescence spectra; RE3+ ion; Na2WO4; luminescence properties; rare earths;
Abstract: In the preparation of this precursor tetraethlortho silicate (TEOS), sodium tungstate, ethyl alcohol, HCl and RECl3 (RE=Eu, Tb) were mixed and then heated at 800℃ for 2h, leading to a luminescent compound. The structure of the materials was characterized by TG-DTA and IR analysis, and the results indicate that the materials were in SiO2 network structure. Three-dimensional fluorescence spectra was used to characterize the luminescent properties of the materials. The luminescence property of doped and un-doped Eu3+ or Tb3+ and Na2WO4 in silica materials were prepared and measured. The results show that good energy transfer from WO2-4 to Eu3+ ion, sensitized the luminescence intensify of Eu3+ remarkably. Tb3+ ion incorporated silica materials expressed the inverse energy transition from Tb3+ to WO2-4, however, we got the materials with homogeneous green blue fluorescent light. Finally, the energy transfer of WO2-4 and Eu3+, WO2-4 and Tb3+ were expained by energy levels diagram.
Li Xia1，Wang Xigui1，Wu Hongying1
(1.Chemistry and Environmental Science College of Inner Mongolia Normal University, Huhhot 010022, China;
2.Rare Earth College of Inner Mongolia University of Science and Technology, Baotou 014010, China)
Abstract:In the preparation of this precursor tetraethlortho silicate (TEOS), sodium tungstate, ethyl alcohol, HCl and RECl3 (RE=Eu, Tb) were mixed and then heated at 800℃ for 2h, leading to a luminescent compound. The structure of the materials was characterized by TG-DTA and IR analysis, and the results indicate that the materials were in SiO2 network structure. Three-dimensional fluorescence spectra was used to characterize the luminescent properties of the materials. The luminescence property of doped and un-doped Eu3+ or Tb3+ and Na2WO4 in silica materials were prepared and measured. The results show that good energy transfer from WO2-4 to Eu3+ ion, sensitized the luminescence intensify of Eu3+ remarkably. Tb3+ ion incorporated silica materials expressed the inverse energy transition from Tb3+ to WO2-4, however, we got the materials with homogeneous green blue fluorescent light. Finally, the energy transfer of WO2-4 and Eu3+, WO2-4 and Tb3+ were expained by energy levels diagram.
Key words:three-dimensional fluorescence spectra; RE3+ ion; Na2WO4; luminescence properties; rare earths;
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