中国物理B ›› 2010, Vol. 19 ›› Issue (6): 63301-063301.doi: 10.1088/1674-1056/19/6/063301
李杰, 王育华, 董其铮, 刘吉地
Li Jie(李杰), Wang Yu-Hua(王育华)†, Dong Qi-Zheng(董其铮), and Liu Ji-Di(刘吉地)
摘要: Y_{0.75 - x}GdxAl0.10BO3:Eu^{3+}0.10, 0.05R3+ (R=Sc, Bi) (0.00 ≤ x ≤ 0.45) powder samples are prepared by solid-state reaction and their luminescence properties are investigated. With the replacement of Y3+ ions by Sc3+ (or Bi3+) and Gd3+ ions in (Y,Al)BO3:Eu, the intensities of emission at 254 and 147~nm are remarkably improved, because Sc3+ ions can absorb UV light and transfer the energy to Eu3+ ions efficiently. Moreover, Gd3+ and Bi^{3 + } ions act as an intermediate ``bridge'' between the sensitizer and the activator (Eu3+) in energy transfer to produce light in the (Y, Gd)BO3:Bi3+, Eu3+ system more effectively. After doping an appropriate concentration of Gd3+ into Y_{0.50}Gd_{0.25}Al0.10BO3:Eu3+_{0.01}, Bi^{3+}_{0.05}, the emission intensity reaches its maximum, which is nearly 110{\%} compared with the red commercial phosphor (Y,Gd)BO3:Eu and better chromaticity coordinates (0.650, 0.350) are obtained.
中图分类号: (Other solid inorganic materials)