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Synthesis and luminescent properties of BaGd2O4:Dy3+, an novel scintillating phosphor |
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| Authors: | Xin-Yuan Sun Yun-Zhi Zhou Xiao-Guang Yu Hao-Hong Chen Hong Wang Zhi-Jun Zhang Xin-Xin Yang Jing-Tai Zhao |
| Institution: | 1. Department of Physics, Jinggangshan University, Ji’an, 343009, People’s Republic of 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 3. Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People’s Republic of China |
| Abstract: | The BaGd2?x O4:xDy3+ (0 ≤ x ≤ 0.08) phosphors were synthesized at 1,300 °C in air by the solid-state reaction route. The as-synthesized phosphors were characterized by X-ray powder diffraction, photoluminescence excitation spectra, photoluminescence (PL) spectra, X-ray excited luminescence (XEL) spectra, and thermoluminescence (TL) spectra. It is found that the quenching concentration of Dy3+ ions in BaGd2O4 host is dependent on the selected excitation wavelength. The optimal PL intensity for the investigated BaGd2?x O4:xDy3+ phosphors is found to be x = 0.01, 0.02, and 0.04, upon excitation by 234, 277, and 350 nm ultraviolet light, respectively. The energy transfer among Dy3+ ions upon excitation by 350 nm is confirmed to be an electric dipole–dipole interaction mechanism based on the fitting of Huang’s rule. In addition, the intensive XEL from BaGd2O4:Dy3+ phosphor is observed by the naked eyes at room temperature, and TL properties of the investigated phosphors are analyzed and discussed. All the results imply that the investigated phosphors could be a promising scintillating phosphor. |
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