Characterization and photoluminescence of Sr2CeO4:Eu+3, la+3

Abstract

In this paper we report the synthesis and luminescence of strontium cerium oxide (Sr2CeO4:Eu3+(0.5mol%), La3+ (0.5mol%) prepared by solid state reaction method in air at 1200°C.These samples were characterized by X-ray diffraction, scanning electron microscope (SEM) and photoluminescence (PL) techniques, particle size analysis. The photo luminescence (PL) spectra of pure and Eu3+, La3+ codoped Sr2CeO4 were recorded at room temperature. Sr2CeO4 phosphor was effectively excited around 250 nm and observed a broad emission band peak around 467 nm. XRD data revealed that the structure of Sr2CeO4 is orthorhombic, and the mean crystallite size of Sr2CeO4 and Sr2CeO4: Eu3+, La3+ were 9 nm and 11nm respectively. The colour co-ordinates of Sr2CeO4 were x = 0.16 and y = 0.18 and CIE co-ordinates revealed that the present phosphors may be used in white light applications. © 2013 VBRI press.