Preparation and characterization of strontium aluminate phosphor

International Conference and Exhibition on Mesoscopic & Condensed Matter Physics

June 22-24, 2015 Boston, USA

D S Raghuwanshi and R P Patel

Shri Shankaracharya Technical Campus, India

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

Present paper reports synthesis of SrAl2O4:Eu2+, Dy3+, thermoluminescence, photoluminescence and long persistent nano phosphor. The sample prepared by combustion method using urea as reducer at 650�ºC. Samples were characterized by Absorption spectra, XRD and SEM. Crystallization, particles size and luminescence properties of the sample have been investigated. It was found' that average size of particles is nano to micrometer. The TL efficiency increases by consecutive heating and irradiation and attains optimum value for certain temperature because there might be a significant probability that once a number of electrons are in a delocalized state on the conduction band they may be recombined or trapped at a deep trapping level associated with TL emission. The emission spectrum consists of 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 longer than traditional sulfide phosphors.

Biography :

D S Raghuwanshi has completed his PhD from Rani Duragawati University Jabalpur, Madhya Pradesh, India. He is currently working as an Associate Professor in Department of Applied Physics, SSTC, SSGI, Bhilai, Chhattisgrah, India. He has published six papers in reputed journals and is doing research work in the field of solid state and material science.

Email: dsraghu29@gmail.com