Luminescence and Energy Transfer of Ce3+, Dy3+ in YAB

The YAl₃(BO₃)₄:Ce₃₊, Dy₃₊ phosphor was synthesized by high temperature solid state reaction. The luminescence properties and the energy transfer between Ce³⁺ and Dy³⁺ were investigated. The emission bands of this phosphor peaked at 419 nm, 483 nm, 575 nm and 667 nm were originated from 5d→4f transition of Ce³⁺ and 4F_9/2→6H_15/2, 4F_9/2→6H_13/2, 4F_9/2→6H_11/2 transition of Dy³⁺ respectively. With the increasing of Dy³⁺ concentration, the intensity of fixed concentration Ce³⁺ decreased and the intensity of Dy³⁺ was simultaneously increased. It suggests that there is an energy transfer from Ce³⁺ to Dy³⁺ in YAl₃(BO₃)₄ host. According to the Dexter´s energy transfer formula of multipolar interaction, the energy transfer between Ce³⁺ and Dy³⁺ is due to the dipole-dipole interaction of the resonance transfer.