Synthesis and luminescent properties of novel BaGd2O4:Eu3+ scintillating phosphor |
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| Authors: | Xin‐Yuan Sun Wen‐Feng Wang Shou‐Qiang Sun Liang‐Wu Lin De‐Yi Li Ling‐Ping Zhou |
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| Affiliation: | 1. Department of Physics, Jinggangshan University, , Ji'an, 343009 People's Republic of China or China;2. Key Laboratory for Ultrafine Materials of the Ministry of Education, East China University of Science and Technology, , Shanghai, 200237 People's Republic of China or China;3. State Key Laboratory for Powder Metallurgy, Central South University, , Changsha, Hunan, 410083 People's Republic of China or China;4. College of Materials Science and Engineering, Hunan University, , Changsha, 410082 People's Republic of China or China |
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| Abstract: | BaGd2‐xO4:xEu3+ and Ba1‐yGd1.79‐2yEu0.21Na3yO4 phosphors were synthesized at 1300°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 © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | solid‐state reaction BaGd2O4:Eu3+ scintillating phosphors photoluminescence energy transfer thermoluminescence |
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