Probing of inversion symmetry site in Eu3+-doped GdPO4 by luminescence study: Concentration and annealing effect

被引：55

作者：

Yaiphaba, N. ^{[2
]}

Ningthoujam, R. S. ^{[1
]}

Singh, N. Shanta ^{[3
]}

Vatsa, R. K. ^{[1
]}

Singh, N. Rajmuhon ^{[2
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[2] Manipur Univ, Dept Chem, Imphal 795003, Manipur, India

[3] Manipur Univ, Dept Phys, Imphal 795003, Manipur, India

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 01期

关键词：

Luminescence; Lanthanide ion; Inversion symmetry; SYSTEMATIC SYNTHESIS; OPTICAL-ABSORPTION; LANTHANIDE; NANOPARTICLES; EU; PHOTOLUMINESCENCE; EMISSION; SPECTRA; POWDERS; GROWTH;

D O I：

10.1016/j.jlumin.2009.08.008

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Eu3+-doped gadolinium orthophosphate (GdPO4) (Eu3+ at% = 0, 2, 5, 7,10,15, 20 and 30) nanoparticles have been prepared by ethylene glycol route and subsequently heated at 500 and 900 degrees C. The crystallite size increases with increasing heat-treatment temperature. Luminescence study shows that magnetic dipole transition (D-5(0) -> F-7(1)) is prominent over the electric dipole transition (D-5(0) -> F-7(2)), which has been attributed to occupancy of inversion symmetry site by more Eu3+ ions in Eu3+-doped GdPO4. The luminescence intensity is enhanced as heat-treatment temperature increases from 500 to 900 degrees C due to the improved crystallinity. Optimum luminescence is observed for 5-7 at% Eu3+ in GdPO4 nanoparticles. Above this concentration, luminescence intensity decreases due to concentration quenching effect. This is supported by lifetime study. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：174 / 180

页数：7

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