Table of Contents
Advances in Optics
Volume 2014 (2014), Article ID 459065, 4 pages
http://dx.doi.org/10.1155/2014/459065
Research Article

Effects of Li+ Codoping on the Optical Properties of SrAl2O4 Long Afterglow Ceramic Phosphors

1Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Republic of Korea
2Department of Nano Fusion Technology, Pusan National University, Busan 609-735, Republic of Korea

Received 1 April 2014; Accepted 15 July 2014; Published 4 August 2014

Academic Editor: Marco Consales

Copyright © 2014 Timur Sh. Atabaev 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

Rare-earths codoped long afterglow strontium aluminate phosphors with high brightness were synthesized via a facile combustion synthesis method using urea as a fuel. The resulted phosphor particles were analyzed by using X-ray diffraction and field emission scanning electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The prepared SrAl2O4:Eu2+, Dy3+, Li+ samples showed a broad green-yellowish emission, peaking at 512 nm when excited by 348 nm. Compared to traditional SrAl2O4:Eu2+, Dy3+ phosphor, the initial luminescence brightness of SrAl2O4:Eu2+, Dy3+, codoped with Li+ improved from 1.89 cd/m2 to 2.71 cd/m2 and the afterglow decay time was prolonged from 103 to 121 min. The possible mechanism of SrAl2O4:Eu2+, Dy3+, Li+ phosphorescence enhancement has been discussed.