Luminescence Properties of Rare Earth Ion-Doped Aluminoborate Glass

Eu2+ mono and Dy3+Eu3+, Tb3+Eu3+ codoped aluminoborate glasses were prepared by hightemperature melting method．The photoluminescence of the obtained glasses were investigated in detail. The results show that Eu2+ monodoped aluminoborate glass can be effectively excited by blue light, and yellowgreen emission band is observed in the emission spectrum．With the increasing of the content of B2O3, the coordination field intensity of glasses decreases and a blue shift of the Eu2+ emission peak occurs．The strongest excitation peak of Dy3+ at 451 nm is observed in the Dy3+Eu3+ co-doped glasses. Under 451 nm excitation, Dy3+ and Eu3+ emit intense blue, yellow and red light, due to the efficient energy transfer from Tb3+ to Eu3+．Under 482 nm blue excitation, Tb3+Eu3+ codoped glasses emit green, yellow and red lights, and the energy transfer from Tb3+ to Eu3+ is observed. By combining these emission bands with blue LED, white light can be emitted.