Luminescent Properties of Re2SiO4:Tm3+ (Re=Mg,Ba,Sr) Under VUV
New phosphors of Tm3+ doped Re2SiO4 (Re=Mg, Ba, Sr) were prepared by the solid-state reaction and their luminescent properties were investigated. X-ray powder diffraction analysis confirmed the formation of Re2SiO4: Tm3+ (Re=Mg, Ba, Sr). The excitation spectra indicated that this phosphor can be effectively excited by 161nm. It consists of peaked at 175nm and a broad excitation band from 184nm to 300nm, corresponded to the absorption of the host lattice and the O−Tm3+ charge transfer transitions. The emission peaks at about 357nm, 459nm, 485nm is separately corresponds to the 1D2 → 3H6, 1D2 → 3H4, 1G4 → 3H6 transitions of Tm3+. As the radius of alkali earth ion in Re site increases, the main emission peaks changed to 478nm from 459nm.
Wei Pan and Jianghong Gong
P. Z. Lu et al., "Luminescent Properties of Re2SiO4:Tm3+ (Re=Mg,Ba,Sr) Under VUV", Key Engineering Materials, Vols. 368-372, pp. 372-374, 2008