title: [VUV spectral properties of GdPO4 : Tm3+ and Sr3Gd (PO4)3 : Tm3+].
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 8S(7/2)-6G(J) 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+ D2 --> 3 H4 (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 Sr3 Gd (PO4)3 : Tm3+ at 166 nm are higher than that of GdPO4 : Tm3+.
authors.affiliation: Lab of Materials for Information Storage and Display, Institute of Photoelectron Technology, Beijing Jiaotong University, Beijing 100044, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: He
authors.forename: Tao
authors.initials: T
authors.lastname: Hou
authors.forename: Dan
authors.initials: D
authors.lastname: Zhou
authors.forename: Peng-Zhi
authors.initials: PZ
authors.lastname: Lu