| 光谱学与光谱分析 |
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| VUV Spectral Properties of GdPO4∶Tm3+ and Sr3Gd(PO4)3∶Tm3+ |
| LI Xin,HE Da-wei*,HOU Tao,ZHOU Dan,LU Peng-zhi |
| Lab of Materials for Information Storage and Display，Institute of Photoelectron Technology, Beijing Jiaotong University, Beijing 100044, China |
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Abstract GdPO4∶Tm3+ and Sr3Gd(PO4)3∶Tm3+ samples were prepared by solid state reaction. The properties of structure, VUV excitation and luminescence under VUV excitation were studied. GdPO4∶Tm3+ belongs to the monoclinic space group, and the crystal structure does not change as the crystal lattice is doped with Tm ions. The excitation spectra of GdPO4∶Tm3+ show strong absorption at 164 and 210 nm due the to host and the 8S7/2—6GJ transition of Gd3+,respectively. The emission spectra of GdPO4∶Tm3+ reveal two intense and sharp emission peaks (453 nm and 363 nm) under 166 nm VUV excitation. The chief emission is at 453 nm from the typical Tm3+ 1D2→3H4 (22, 123 cm-1) transition. The emission spectra of Sr3Gd(PO4)3∶Tm3+ at 363 nm is weakened, while the blue emission at 453 nm is strengthened because the excitation spectra of Sr3Gd(PO4)3∶Tm3+ at 166 nm are higher than that of GdPO4∶Tm3+.
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Received: 2006-05-08
Accepted: 2006-08-16
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Corresponding Authors:
HE Da-wei
E-mail: dwhe@bjtu.edu.cn
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