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Journal of Research in Physics

The Journal of University of Novi Sad

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2217-933X
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The concentration quenching of photoluminescence in Eu3+-doped La2O3

V. Đorđević / Ž. Antić / M. G. Nikolić / M. D. Dramićanin
Published Online: 2014-05-27 | DOI: https://doi.org/10.2478/jrp-2013-0005

Abstract

This work explores the influence of dopant concentration on photoluminescent emission and kinetics of Eu3+-doped (0.2−10 at.%) nanocrystalline lanthanumoxide powders. The X-ray diffraction analysis confirmed that all samples crystallize in La2O3 hexagonal phase with space group P3¯ m1. Transmission electron microscopy showed particles with non-uniform shape and diverse size distribution with an average particle size of (95 ± 5) nm. The room temperature photoluminescence spectra of all samples contain characteristic Eu3+ luminescence lines with the most pronounced red 5D0 7F2 emission at about 626 nm. The maximum intensity of red emission is observed for the sample containing 5at.% of Eu3+ ions. The emission kinetics was recorded in the temperature range from 10K to 300 K. The maximum lifetime value of 0.98 ms obtained for the sample with 0.5at.% Eu3+ at room temperature increases up to 1.3ms at 10 K.

Keywords: Concentration quenching; Eu3+; La2O3

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About the article

Received: 2013-12-24

Published Online: 2014-05-27

Published in Print: 2013-01-01


Citation Information: Journal of Research in Physics, ISSN (Online) 2217-933X, DOI: https://doi.org/10.2478/jrp-2013-0005.

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© by V. Đorđević. This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. BY-NC-ND 3.0

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