稀土离子Ce,Tb掺杂硼磷酸锶荧光粉的发光性质  

Luminescence Properties of Rare Earth Ions in 2SrO·0.84 P_2O_5·0.16 B_2O_3: RE^(3+)(RE=Ce, Tb)

作　　者：刘春棠[1] 何大伟[1] 李少霞[1] 刘端阳[1] 鲁成祝[1] 

机构地区：[1]北京交通大学光电子技术研究所

出　　处：《光谱学与光谱分析》2005年第8期1203-1206,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(59982001);北京市自然科学基金(2052019)资助项目

摘　　要：采用高温固相法合成了2SrO.0.84P2O5.0.16B2O3:RE3+(RE=Ce,Tb)荧光粉,研究了其中Ce3+,Tb3+的光谱性质,以及Ce3+与Tb3+共掺杂时的能量传递现象。发现Ce3+在232,296nm处有两个激发带,发射光谱中也有两个峰,且两者重叠严重,用高斯分峰拟合得到曲线峰值分别为325,344nm,这两个发射峰可能来自于两个不同的发光中心的发射。Tb3+的激发光谱中以370nm的激发峰最强,发射光谱中同时观测到来自5D3和5D4的发射,表明在此体系中能级5D3和5D4间的无辐射跃迁过程不显著。Ce3+和Tb3+在此基质中的共掺杂存在Ce3+到Tb3+的有效能量传递。The phosphors of 2SrO·0.84 P2O5 ·0.16 B2O3 ： RE^3＋ （RE= Ce, Tb） were synthesized by high temperature solid state reaction. The luminescence properties of Ce^3＋ , Tb^3＋ and the sensitization of Ce^3＋ to Tb^3＋ were studied. In the excitation spectrum of Ce^3＋ , there are two broad bands at 232 and 296 nm respectively, Because of the large overlap between the emission bands, the authors could not separate them from each other. The authors could get two bands at 325 and 344 nm with the Gaussian fitting method. The possible reason is that these two peaks are from two light centers. In the phosphor of 2SrO·0.84 P2O3 ·0.16 B2O3 ： Tb^3＋ , the excitation spectrum of Tb^3＋ exhibits high absorption at 370 nm and emission spectrum shows the strongest emission peak at 548 nm. The emission from the levels of ^5 D3 and ^5 D4 of Tb^3 ＋ appear at the same time, indicating that non-radiative process between them is inefficient. In the phosphor of Ce^3＋ and Tb^3＋ co-doped 2SRO·0.84 P2O3 ·0.16 B2O3, efficient energy transfer exists.

关 键 词：Ce^3+.Tb^3+离子 光谱 能量传递 

分 类 号：O614.3[理学—无机化学]