Ba2Mg(BO3)2:Ce3+,Eu2+,Na+: A potential single-phased two colour borate phosphor for white light-emitting diodes

A two colour phosphor Ba2Mg(BO3)2:Ce3+,Eu2+,Na+ was synthesized using solid-state reaction method. Luminescence of Ba2Mg(BO3)2:Ce3+,Eu2+,Na+ showed 416 and 618 nm emission bands attributed to Ce3+ and Eu2+ emission, respectively. Energy transfer occurred from Ce3+ to Eu2+ through a significant overlap of Eu2+ excitation spectrum with Ce3+ emission spectrum in Ba2Mg(BO3)2. They also showed that under the excitation of UV radiation, bluish or yellowish white light was generated by coupling a broad blue emission band and a red emission band. By combining with green phosphor, Ba2Mg(BO3):Ce3+,Eu2+,Na+ phosphor showed potential application for white light-emitting diodes (LEDs).