Sb3+对Tb3+激活硅酸盐玻璃发光性能的影响

利用高温熔融法分别制备了Sb3 ,Tb3 单掺和共掺的硅酸盐发光玻璃,并分析了它们的光谱性质。根据对Sb3 和Tb3 掺杂硅酸盐玻璃的激发光谱、发射光谱和发光衰减时间等特性的分析,研究了澄清剂Sb2O3的加入对Tb3 激活硅酸盐玻璃发光性能的影响。结果表明,在紫外光激发下,Tb3 激活硅酸盐玻璃中存在Sb3 离子至Tb3 离子的能量传递,但能量传递效率较低,能量传递表现为Sb3 离子的3P1能级与Tb3 离子的5D3能级之间的能量无辐射共振转移。同时Sb3 离子的加入将在Sb3 离子和Tb3 离子的激发重叠区域(200～350nm)对Tb3 离子的激发产生不小的负面影响,尚不足以通过Sb3 离子至Tb3 离子的能量传递得以弥补。因此在使用Sb2O3作为Tb3 激活硅酸盐发光玻璃的澄清剂时,应当注意权衡Sb3 离子对Tb3 离子发光性能的影响。

Effects of Sb3+ on the Luminescent Properties of Tb3+ Doped Silicate Glass

The Sb3 -doped silicate glasses,Tb3 -doped silicate glasses,and Sb3 and Tb3 co-doped silicate glasses were synthesized by high-temperature melting method,and their spectral properties were analyzed.The effects of Sb2O3 added as a fining agent on the luminescent properties of Tb3 -doped silicate glasses were studied with excitation spectra,emission spectra and decay time.The results show that there is energy transfer from Sb3 ions to Tb3 ions in the Sb3 and Tb3 co-doped silicate glasses under UV excitation,but the energy transfer efficiency between them is quite low.The energy transfer takes place between the 3P1 energy level of Sb3 ions and the 5D3 energy level of Tb3 ions in the Sb3 and Tb3 co-doped silicate glasses,and the way of the energy transfer from Sb3 ions to Tb3 ions is nonradiative energy resonance transfer.Meanwhile,introducing Sb2O3 used as a fining agent will reduce the excitation intensity of Tb3 ions in the silicate glasses in the overlap excitation region of both Sb3 ions and Tb3 ions,which corresponds to the region from 200 to 350 nm.The reduction in the excitation intensity of Tb3 ions caused by introducing Sb3 ions is so evident that it can not be compensated by the energy transfer from Sb3 ions to Tb3 ions.Therefore,the negative effects of Sb3 ions on the luminescent properties of Tb3 ions in silicate glasses should be measured when Sb2O3 is planned to be used as a fining agent in Tb3 -doped silicate glasses.