Tb^(3+),Eu^(3+)单掺杂、双掺杂SrSiO_3的合成、结构表征与发光性能

Preparation,Characterization and Photoluminescence Properties of Single-Doped and Double-Doped SrSiO_3:Eu^(3+),Tb^(3+) Phosphor

采用液相沉淀法合成了铽单掺杂,铕单掺杂,铽、铕双掺杂的硅酸锶发光材料。其结构经X-射线衍射表征。研究了合成样品的激发、发光光谱。研究结果表明:在254nm波长紫外光激发下,SrSiO_3:0.04Eu^(3+)的发光光谱中出现4个Eu^(3+)的发光峰,分别为Eu^(3+)的~5D_0→~7F_1(588、590nm)、~5D_0→F_2(609nm)、~5D_0→~7F_3(626nm)、~5D_0→~4F_4(651nm)跃迁峰;SrSiO_3:0.04Tb^(3+)的发光光谱中出现4个Tb^(3+)的发光峰,分别为Tb^(3+)的~5D4→~F_6(488nm)、~5D_4→~7F_5(541、548nm)、~5D_4→~7F_4(584nm)跃迁峰;SrSiO_3:0.04Tb^(3+),0.04Eu^(3+)发光体系中,Tb^(3+)的共掺杂显著增强了Eu^(3+)的特征发射,存在Tb^(3+)→Eu^(3+)的能量传递现象,结果表明有Eu^(3+)和Tb^(3+)两个发光中心。

Eu^3＋ doped,Tb^3＋ doped and Eu^3＋,Tb^3＋ co-doped SrSiO3 phosphors were prepared by precipitation method.The structures of the compounds were characterized by the X-ray diffraction （XRD）.The excitation and emission spectra of the synthetic samples were studied.The results indicated that the emission spectra of SrSiO3：0.04Eu^3＋ showed four emission peaks（excited at 254nm under the UV-light）,which were attributed to the typical 5D0→7F1（588,590nm）,5D0→7F2（609nm）, 5D0→7F3（626nm）,5D0→7F4（651nm） transition of Eu^3＋,and the emission spectra of SrSiO3： 0.04Tb^3＋ showed four emission peaks,which were attributed to the typical 5D4→7F6（488nm）, 5D4→7F5（541,548nm）,5D4→7F4（584nrn） transition of Tb^3＋.The luminescence properties of Eu^3＋ ions in SrSiO3：0.04 Tb^3＋,0.04 Eu^3＋ system could be evidently improved by co-doping of Tb^3＋ ions, which was due to the efficient energy transfer process from Tb^3＋ to Eu^3＋ ions.The results indicated that the material SrSiO3：Eu^3＋,Tb^3＋ had two luminescent centers Eu^3＋ and Tb^3＋.