Effects of charge compensation on photoluminescence properties of Ba_3B_2O_6:Eu~(3+) phosphor

In order to improve the photoluminescence intensity of the red Ba3B2O6: Eu3+ phosphors, using Li+ as the charge compensation agent, the red Ba3B2O6: Eu3+, Li+ phosphors were synthesized by solid reaction process and the effects of Eu3+and Li+ doping amounts on photoluminescence properties of Ba3B2O6: Eu3+, Li+ phosphors were investigated. Upon excitation with 393 nm near-UV light, Ba3B2O6: Eu3+, Li+ phosphor emits red light due to the 4f-4f transition of Eu3+, and the highest photoluminescence intensity at 618 nm is found. The optimal doping amounts are mole fraction of 4% for Eu3+and 8% for Li+ in Ba3B2O6. Under the condition of doping charge compensation agent Li+, the luminescent intensities of Ba3B2O6: Eu3+ phosphor are enhanced. When the mole fraction of Li+ is 8%, the photoluminescence intensity of Ba3B2O6: Eu3+, Li+ phosphor at 618 nm is about 4 times of that of Ba3B2O6: Eu3+ phosphor.