Journal
LUMINESCENCE
Volume 28, Issue 3, Pages 384-391Publisher
WILEY
DOI: 10.1002/bio.2394
Keywords
solid-state reaction; BaGd2O4:Eu3+scintillating phosphors; photoluminescence; energy transfer; thermoluminescence
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Funding
- National Natural Science Fund of China [11165010]
- Natural Science Foundation of Jiangxi province [20114BAB202002]
- Scientific Project of Department of Education in Jiangxi Province [GJJ12462]
- Key Subject of Atomic & Molecular Physics in Jiangxi Province
- Open Fund of Key Laboratory for Ultrafine Materials of the Ministry of Education, East China University of Science and Technology
- Program for Young Excellent Doctors in Jinggangshan University [JZB007]
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BaGd2-xO4:xEu3+ and Ba1-yGd1.79-2yEu0.21Na3yO4 phosphors were synthesized at 1300 degrees C in air by conventional solid-state reaction method. Phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence excitation (PLE) spectra, photoluminescence (PL) spectra and thermoluminescence (TL) spectra. Optimal PL intensity for BaGd2-xO4:xEu3+ and Ba1-yGd1.79-2yEu0.21Na3yO4 phosphors at 276 nm excitation were found to be x=0.24 and y=0.125, respectively. The PL intensity of Eu3+ emission could only be enhanced by 1.3 times with incorporation of Na+ into the BaGd2O4 host. Enhanced luminescence was attributed to the flux effect of Na+ ions. However, when BaGd2O4:Eu3+ phosphors were codoped with Na+ ions, the induced defects confirmed by TL spectra impaired the emission intensity of Eu3+ ions. Copyright (c) 2012 John Wiley & Sons, Ltd.
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