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Title: Preparation, luminescence and defect studies of Eu{sup 2+}-activated strontium hexa-aluminate phosphor prepared via combustion method

Abstract

Preparation of Eu{sup 2+} 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 deg. 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 photoluminescence (PL) spectra. Thermally stimulated luminescence studies also have been carried out on SrAl{sub 12}O{sub 19}:Eu{sup 2+} phosphor. The TSL glow curve is broad and indicates two dominant peaks at 206 and 345 deg. 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{sup +} centre. The two annealing stages of F{sup +} centre in the region 125-230 and 340-390 deg. C appear to correlate with the release of carriers resulting in TSL peaks at 206 and 345 deg. C, respectively. - Graphical abstract: SEM image of SrAl{sub 12}O{sub 19}:Eu.

Authors:
 [1];  [2];  [3]
  1. Key Lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)
  2. R.S.I.C., Indian Institute of Technology, Powai, Mumbai 400 076 (India)
  3. Key Lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China). E-mail: jjzhu@nju.edu.cn
Publication Date:
OSTI Identifier:
20905413
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 179; Journal Issue: 8; Other Information: DOI: 10.1016/j.jssc.2006.04.053; PII: S0022-4596(06)00257-X; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINATES; ANNEALING; COMBUSTION; CRYSTAL DEFECTS; ELECTRON SPIN RESONANCE; EUROPIUM IONS; FLUORINE IONS; G VALUE; GLOW CURVE; OPTICAL PROPERTIES; PHOSPHORS; PHOTOLUMINESCENCE; SCANNING ELECTRON MICROSCOPY; SPECTRA; STRONTIUM COMPOUNDS; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; THERMOLUMINESCENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Singh, Vijay, Gundu Rao, T.K., and Zhu Junjie. Preparation, luminescence and defect studies of Eu{sup 2+}-activated strontium hexa-aluminate phosphor prepared via combustion method. United States: N. p., 2006. Web. doi:10.1016/j.jssc.2006.04.053.
Singh, Vijay, Gundu Rao, T.K., & Zhu Junjie. Preparation, luminescence and defect studies of Eu{sup 2+}-activated strontium hexa-aluminate phosphor prepared via combustion method. United States. doi:10.1016/j.jssc.2006.04.053.
Singh, Vijay, Gundu Rao, T.K., and Zhu Junjie. Tue . "Preparation, luminescence and defect studies of Eu{sup 2+}-activated strontium hexa-aluminate phosphor prepared via combustion method". United States. doi:10.1016/j.jssc.2006.04.053.
@article{osti_20905413,
title = {Preparation, luminescence and defect studies of Eu{sup 2+}-activated strontium hexa-aluminate phosphor prepared via combustion method},
author = {Singh, Vijay and Gundu Rao, T.K. and Zhu Junjie},
abstractNote = {Preparation of Eu{sup 2+} 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 deg. 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 photoluminescence (PL) spectra. Thermally stimulated luminescence studies also have been carried out on SrAl{sub 12}O{sub 19}:Eu{sup 2+} phosphor. The TSL glow curve is broad and indicates two dominant peaks at 206 and 345 deg. 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{sup +} centre. The two annealing stages of F{sup +} centre in the region 125-230 and 340-390 deg. C appear to correlate with the release of carriers resulting in TSL peaks at 206 and 345 deg. C, respectively. - Graphical abstract: SEM image of SrAl{sub 12}O{sub 19}:Eu.},
doi = {10.1016/j.jssc.2006.04.053},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 8,
volume = 179,
place = {United States},
year = {2006},
month = {8}
}