| 光谱学与光谱分析 |
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| Luminescence of Sr2Mg(BO3)2∶Tb3+ under Vacuum Ultraviolet Excitation |
| LIN Hui-hong1，2, LIANG Hong-bin2*, SU Qiang2, ZHANG Guo-bin3 |
1. Department of Chemistry, Hanshan Normal University, Chaozhou 521041, China
2. MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
3. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China |
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Abstract The phosphors of Tb3+ activated Sr2Mg(BO3)2 were prepared by high temperature solid-state reaction technique. The phase purity was characterized by the powder X-ray diffraction (XRD). The luminescence properties in VUV-Vis range as well as the decay curves were investigated. The results demonstrate that the band near 178 nm in the VUV excitation spectra is ascribed to the host-related absorption. The bands of lowest spin-allowed and spin-forbidden f—d transition are located at 235 and 278 nm, respectively. The strongest emission is at 543 nm upon 172 nm excitation and with the color coordinate (0.30, 0.45). The decay time is about 2.8 ms.
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Received: 2010-09-28
Accepted: 2011-02-11
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Corresponding Authors:
LIANG Hong-bin
E-mail: cesbin@mail.sysu.edu.cn
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