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Preparation, luminescence and defect studies of Eu2+-activated strontium hexa-aluminate phosphor prepared via combustion method

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Title Preparation, luminescence and defect studies of Eu2+-activated strontium hexa-aluminate phosphor prepared via combustion method
 
Creator SINGH, V
RAO, TKG
ZHU, JH
 
Subject alkaline-earth sulfates
paramagnetic-resonance
optical-properties
k3na(so4)(2)
fluorescence
spectroscopy
emission
gallate
ce
luminescence
combustion synthesis
phosphors
defect
 
Description 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
 
Publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
 
Date 2011-07-12T16:44:56Z
2011-12-26T12:48:59Z
2011-12-27T05:34:33Z
2011-07-12T16:44:56Z
2011-12-26T12:48:59Z
2011-12-27T05:34:33Z
2006
 
Type Article
 
Identifier JOURNAL OF SOLID STATE CHEMISTRY, 179(8), 2589-2594
0022-4596
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
 
Language en