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Advances in Condensed Matter Physics
Volume 2009 (2009), Article ID 327605, 8 pages
http://dx.doi.org/10.1155/2009/327605
Research Article

Optical Properties of L i I n ( 1 − 𝑥 ) T m 𝑥 ( W O 4 ) 2 Blue Phosphor

1LASICOM, Saad Dahlab University, BP 270, Route de Soumaa, 09000, Blida, Algeria
2ICMCB, Bordeaux I University, 87 avenue A. Schweitzer, 33608 Pessac, France
3Laser Department, Nuclear Research Center of Algiers-CRNA, 2 Building Frantz Fanon, B.P 399 Alger 16000, Algeria
4UDTS, 2 Building Frantz Fanon, BP. 140 Alger-7 Merveilles, 16200 Alger, Algeria
5LSS, Université des Sciences et de la Technologie Houari Boumediene, BP 32, EL ALIA 16111 BAB EZZOUAR ALGER.USTHB, Faculté de Physique, Alger, Algeria

Received 28 July 2009; Revised 8 November 2009; Accepted 30 November 2009

Academic Editor: David Huber

Copyright © 2009 Mourad Derbal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

L i I n 1 − 𝑥 T m 𝑥 ( W O 4 ) 2 ( 𝑥 = 0 , 0.5, 1, 5, and 10 at.%) polycrystalline powders blue phosphors were prepared via the classical solid-state reaction method. X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation, and emission spectra were used to characterize L i I n 1 − 𝑥 T m 𝑥 ( W O 4 ) 2 phosphors. By analyzing the excitation and emission spectra of L i I n 1 − 𝑥 T m 𝑥 ( W O 4 ) 2 samples, the result indicates that there exists the energy transfer only from the W O 4 2 − group to the 1 G 4 energy level of T m 3 + ion. On the other hand, the influence of the thulium concentration on the blue emission transition 1 D 2 → 3 F 4 and 1 G 4 → 3 H 6 and the emission of W O 4 2 − group are investigated.