Optical properties and Judd-Ofelt analysis of Eu3+ activated calcium silicate

被引：28
|
作者：
Barve, R. A. [1 ]
Suriyamurthy, N. [1 ]
Panigrahi, B. S. [1 ]
Venkatraman, B. [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Radiol Safety & Environm Grp, Kalpakkam 603102, Tamil Nadu, India
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 475卷
关键词：
Silicates; Optical properties; Rare earth ions; TRANSITIONS; IONS; PHOTOLUMINESCENCE; SPECTROSCOPY; GLASSES;
D O I：
10.1016/j.physb.2015.07.029
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Eu3+ activated calcium silicate was synthesized in stoichiometric ratio using the co-precipitation technique. The phosphors were characterized using X-ray diffraction and photoluminescence technique. Based on Judd-Ofelt (J-O) analysis, the intensity parameters Omega(2) and Omega(4), were calculated from the emission spectra for various Europium concentrations. The determined values indicate higher hypersensitive behavior of the D-5(0)-> F-7(2) transition of Eu3+ ions in the host matrix and a stronger covalency. Different radiative properties have been discussed as the function of Eu3+ concentration. The lifetime decay pattern recorded for these samples indicated single exponential behavior. The quantum efficiency has been calculated to be 62% from the emission spectrum and the fluorescence lifetime was found to be 2.9 ms. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：156 / 161
页数：6
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