JMS_V2_N3_RP4 R.P. Patel Journal on Material Science 2347–615X 2 3 27 30 SrAl2O4, Photoluminescence, Nanophosphor, Long Persistence, Photoluminescence, After Glow Present paper reports the synthesis of SrAl2O4 :Eu2+, Dy3+ long persistent nano phosphor by combustion method using urea as reducer at 650°C. Crystallization, particles size and luminescence properties of the sample have been investigated. It is found' that the average size of particle is nano to micrometer. The emission spectra are broad bands with the peaks at 520 nm, respectively. The persistent luminescence phenomenon involves the formation of traps followed by thermal bleaching of traps and the characteristic Eu2+ emission as well as the nature of traps and a persistent time 10 times longer than traditional sulfide phosphors . Absorption spectra and XRD have been used to characterize the synthesized phosphor. October - December 2014 Copyright © 2014 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2965