Luminescent characteristics of Ba3 Y2(BO3)4:Eu3+ phosphor for white LED

The Ba3Y2(BO3)4:Eu3+ phosphor was synthesized using a high temperature solid-state reaction method and the luminescent characteristics were investigated. The emission spectrum exhibited one strong red emission at 613 nm, corresponding to the electric dipole 5 D0-7 F2 transition of Eu3+, under 365 nm excitation. The excitation spectrum of 613 nm indicated that the Ba3Y2(BO3)4:Eu3+ phosphor was effectively excited by ultraviolet (UV) (254, 365 and 400 nm) and blue (470 nm) light. The effect of Eu3+ concentration on the 613 nm emission of the Ba3Y2(BO3)4:Eu3+ phosphor was measured. The results showed that the emission intensity increased with increasing Eu3+ concentration, and then decreased. The CIE color coordinates of Ba3Y2(BO3)4:Eu3+ phosphor were x=0.641 and y=0.359 at 15 mol.% Eu3+.