Phosphor; solid state reaction; X-ray diffraction; photoluminescence; SEM; CIE; particle size
1Department of Physics, VRS & YRN College, Chirala 523157, A.P, India
2Department of Physics, VSR & NVR College, Tenali 522201, Guntur District, A.P, India
3Display Materials Laboratory, Applied Physics Department, Faculty of Technology & Engineering, M.S University of Baroda, Baroda 390001, India
Adv. Mater. Lett., 2013, 4 (3), pp 207-212
Publication Date (Web): Jan 21, 2013
Copyright © IAAM-VBRI Press
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 12000C.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 Sr 2CeO4 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.
Phosphor, solid state reaction, X-ray diffraction, photoluminescence, SEM, CIE, particle size analysis.