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+.
Key words：Phosphate;Excitation spectra;Emission spectra;VUV;Energy transfer
[1] Chang-hong Kim. Journal of Alloys and Compounds, 2000, 311: 33. [2] Rao R P. Journal of the Electrochem. Soc., 2003, 150(8): H165. [3] Monine B, Bizarri G. Optical Materials, 2006, 28: 58. [4] Sasum U, Kloss M. Journal of Luminescence, 1997，72-74：255. [5] Plasmaco Inc., Industrial Co. Ltd. Journal of Luminescence 2005，113：271. [6] Liang Hongbin, Tao Ye, Xu Jianghua. Journal of Solid State Chemistry, 2004，177: 901. [7] Segal D J, Santoro R P, Newnham R E. Zeit. Kristallog.，1966，123：1. [8] Schwarz L, Finke B, Kloss M. Journal of Luminescence, 1997，72-74：257. [9] LIU Duan-yang，HE Da-wei，KANG Kai，et al(刘端阳，何大伟，康 凯，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005, 25(7): 1034.
