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The luminescence properties of Sr3Gd(BO3)3: Tb3+ phosphors under vacuum ultraviolet excitation |
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| Authors: | WenYu Zhao SongWei Gao ShengLi An Bin Fan SongBo Li |
| Institution: | 1. School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China 3. School of Material and Metallurgical Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China |
| Abstract: | Tb3+-activated Sr3Gd(BO3)3 green phosphors were prepared by conventional solid-state reaction. The vacuum ultraviolet (VUV) excitation, photoluminescence (PL) and decay properties of the phosphors in the visible range were investigated. The excitation spectrum showed a strong broad band from 160 to 200 nm with a maximum at 183 nm which was adjacent to the VUV excitation light source of 172 nm. Under excitation at 172 nm, the optimum co-doping concentration of Tb3+ was 10 mol%, and the emission intensity of Sr3Gd0.9(BO3)3:0.1Tb3+ was comparable to that of commercial Zn2SiO4:Mn2+. The strongest emission peak of Sr3Gd0.9(BO3)3:0.1Tb3+ was at 543 nm with chromaticity coordinates of (0.2626, 0.4922) and a lifetime of 2.32 ms. The optical properties of the green phosphor Sr3Gd(BO3)3: Tb3+ make it suitable for use in Hg-free fluorescent lamps and plasma display panels. |
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