Luminescence properties of novel NaBa4(BO3)3:Ce3+, Eu3+ phosphors

Novel Eu3+, Ce3+ activated NaBa4(BO3)3 phosphors were synthesized by solid-state reactions. The excitation spectrum of NaBa4(BO3)3:Ce3+ consists of an intense band peaking at 350 nm and a weak band in the higher energy side, and the emission spectrum exhibits a blue band with a maximum at about 420 nm. The Eu3+ emission in NaBa4(BO3)3 consists of the transitions from 5D0 to 7FJ, and the excitation spectrum consists of broad excitation band peaking at 270 nm and some intense narrow lines. The optimum doped concentration, the critical distance of the concentration quenching, and the fluorescence lifetime have also been investigated.