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Y 0.75 -x Gd x Al 0.10 BO 3 :Eu0.10 3+, 0.05R 3+ (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 Y 3+ ions by Sc 3+ (or Bi 3+ ) and Gd 3+ ions in (Y,Al)BO 3 :Eu, the intensities of emission at 254 and 147 nm are remarkably improved, because Sc 3+ ions can absorb UV light and transfer the energy to Eu 3+ ions efficiently. Moreover, Gd 3+ and Bi 3+ ions act as an intermediate “bridge” between the sensitizer and the activator (Eu 3+ ) in energy transfer to produce light in the (Y, Gd)BO 3 :Bi 3+ , Eu 3+ system more effectively. After doping an appropriate concentration of Gd 3+ into Y 0.50 Gd 0.25 Al 0.10 BO 3 :Eu0.01 3+ , Bi0.05 3+ , the emission intensity reaches its maximum, which is nearly 110% compared with the red commercial phosphor (Y,Gd)BO 3 :Eu and better chromaticity coordinates (0.650, 0.350) are obtained.
Y 0.75-x Gd x Al 0.10 BO 3: Eu 0.10 3+, 0.05R 3+ (R = Sc, Bi) (0.00 ≤ x ≤ 0.45) powder samples are prepared by solid-state reaction and their luminescence properties are . With the replacement of Y 3+ ions by Sc 3+ (or Bi 3+) and Gd 3+ ions in (Y, Al) BO 3: Eu, the intensities of emission at 254 and 147 nm are remarkably improved, because 3+ ions can absorb UV light and transfer the energy to Eu 3+ ions efficiently. Moreover, Gd 3+ and Bi 3+ ions act as an intermediate “bridge” between the sensitizer and the activator (Eu 3+) in energy After doping an appropriate concentration of Gd 3+ into Y 0.50 Gd 0.25 Al 0.10 BO 3: Eu 0.01 3+, Eu 3+ Bi0.05 3+, the emission intensity reaches its maximum, which is nearly 110% compared with the red commercial phosphor (Y, Gd) BO 3: Eu and better chromaticity coordinates (0.650, 0.350) are obtained.