Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory

被引：12

作者：

Vukovic, Katarina ^{[1
]}

Medic, Mina ^{[1
]}

Sekulic, Milica ^{[1
]}

Dramicanin, Miroslav D. ^{[1
]}

机构：

[1] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade 11000, Serbia

来源：

ADVANCES IN CONDENSED MATTER PHYSICS | 2015年 / 2015卷

关键词：

SPECTROSCOPIC PROPERTIES; OPTICAL SPECTROSCOPY; INTENSITIES; IONS; LUMINESCENCE; PARAMETERS; EUROPIUM(III); LANTHANIDES; DIFFRACTION; TRANSITION;

D O I：

10.1155/2015/736517

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Eu3+ doped Mg-2 TiO4 (2 at% of Eu) nanoparticles which are 5 to 10 nm in diameter are prepared by Pechini-type polymerized complex route followed with the calcination in the temperature range from 400 degrees C to 700 degrees C. Emission spectra display characteristic D-5(0) -> F-7(J) (J = 0, 1, 2, 3, and 4) spin forbidden f-f electronic transitions of the Eu3+ ions with the most pronounced emission coming from D-5(0) -> F-7(2) transition and with the emission decays varying between 0.57 and 0.87ms for samples prepared at different temperatures. Judd-Ofelt theoretical analysis of the emission spectra of Eu3+ ions was performed, which allowed calculating radiative and nonradiative emission probabilities, Judd-Ofelt intensity parameters, and the quantum efficiency of the Eu3+ emission in the Mg-2 TiO4 nanoparticles. The analyses showed the existence of high asymmetry around the metal ion sites. Also, the largest quantum efficiency of emission of 58.5% is found in nanoparticles prepared at 600 degrees C.

引用

页数：7

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