| 【文章摘要】 Zn2Si O4︰Tb3+, Zn2 Si O4︰Ce3+, Zn2 Si O4︰Tb3+, Ce3+ phosphors were prepared by solidstate reaction at 1 150 ℃ for 2h under a weak reducing atmosphere. Moreover, the XRD patterns and photoluminescence spectra were recorded and the effects of Tb3+ and Ce3+ concentration on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet light(333 nm) radiation showed a dominant peak at 542 nm attributed to the 5D4→7F5 transition of Tb3+, which was enhanced significantly(about 45 times) by the co-doping of Ce3+, indicating that there occurred an efficient energy transfer from Ce3+ to Tb3+. According to the Dexter's energy transfer formula of multipolar interaction, it was demonstrated that the energy transfer between Ce3+ and Tb3+ was due to the electric dipolar-dipolar interaction of the resonance transfer. |