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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3385

Title: Preparation, luminescence and defect studies of Eu2+-activated strontium hexa-aluminate phosphor prepared via combustion method
Authors: SINGH, V
RAO, TKG
ZHU, JH
Keywords: alkaline-earth sulfates
paramagnetic-resonance
optical-properties
k3na(so4)(2)
fluorescence
spectroscopy
emission
gallate
ce
Issue Date: 2006
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation: JOURNAL OF SOLID STATE CHEMISTRY, 179(8), 2589-2594
Abstract: Preparation of Eu2+ ions activated strontium hexa-aluminate phosphor using the combustion method is described. An efficient phosphor can be prepared by this method at reaction temperatures as low as 500 degrees C in a few minutes. Powder X-ray diffraction (XRD), transmission electron microscopy, scanning electron microscope analysis were used to characterize the as prepared product and the optical properties were studied by photo luminescence (PL) spectra. Thermally stimulated luminescence studies also have been carried out on SrAl12O19:Eu2+ phosphor. The TSL glow curve is broad and indicates two dominant peaks at 206 and 345 degrees C. Defect centres formed in irradiated phosphor have been studied using the technique of electron spin resonance. One of the centres is characterized by an isotropic g-value of 2.0055 and is assigned to a F+ centre. The two annealing stages of F+ centre in the region 125-230 and 340-390 degrees C appear to correlate with the release of carriers resulting in TSL peaks at 206 and 345 degrees C, respectively. (c) 2006
URI: http://dx.doi.org/10.1016/j.jssc.2006.04.053
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3385
http://hdl.handle.net/10054/3385
ISSN: 0022-4596
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