The effect of silica content on the luminescence properties of Tb3+-doped calcium aluminosilicate glasses

被引：17
|
作者：
dos Santos, J. F. M. [1 ]
Astrath, N. G. C. [2 ]
Baesso, M. L. [2 ]
Nunes, L. A. O. [1 ]
Catunda, T. [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis Sao Carlos, POB 369, BR-13560970 Sao Carlos, SP, Brazil
[2] Univ Estadual Maringa, Dept Fis, Av Colombo 5790, BR-87020900 Maringa, Parana, Brazil
来源：
JOURNAL OF LUMINESCENCE | 2018年 / 202卷
关键词：
Calcium aluminosilicate glasses; Tb3+ luminescence; Upconversion spectra; QUANTUM EFFICIENCY MEASUREMENTS; REFRACTIVE-INDEX CHANGES; UP-CONVERSION; TB3+ IONS; SATURATION; EXCITATION; CRYSTALS;
D O I：
10.1016/j.jlumin.2018.05.008
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Tb3+ doped materials exhibit strong emission in the green (D-5(4)) and weak emission in the UV-blue (D-5(3)) regions. The blue emission can occur from direct UV excitation or by excited state absorption, through D-5(4) metastable level. In this paper, we investigate the effect of silica content on the spectroscopic properties of the Tb3+ doped calcium aluminosilicate glasses. The low silica calcium aluminosilicate glass (LSCAS) and calcium aluminosilicate glass (CAS) doped with 0.5 wt% of Tb3+ were prepared and characterized through absorption, excitation, Stokes emission, upconversion emission and D-5(4) lifetime decay measurements. The green luminescence in the LSCAS glass presented a fast quenching. The silica influence on this behavior was discussed and a comprehensive interpretation is presented, correlating the Tb3+ luminescence behavior with the silica concentration. Additionally, we analyze the excited state absorption effect on fluorescence transients to D-5(4) energy level life-times.
引用
收藏
页码：363 / 369
页数：7
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