The crystal structure and luminescence of phosphor Ba9Sc2Si6O24:Eu2+,Mn2+ for white light emitting diode

• Phosphors Ba9Sc2Si6O24:Eu0.09,Mnx were synthesized by a solid-state reaction.
• Under near ultraviolet exciting, Ba9Sc2Si6O24:Eu0.09,Mnx could emit white light by tuning the concentration of Mn.
• Energy transfer process from Eu to Mn in Ba9Sc2Si6O24 was demonstrated.

Single-phase white light emitting phosphor Ba9Sc2Si6O24:Eu2+,Mn2+ has been successfully prepared by solid-state reaction. The energy transfer process from Eu2+ to Mn2+ has been demonstrated based on the excitation spectra, luminescent lifetime and low temperature spectra. Under ultraviolet light excitation, Eu2+ emits blue light (∼460 nm) and green light (∼512 nm), Mn2+ gets the energy transferred from Eu2+ and emits red light (∼615 nm). White light is obtained by tuning the concentration of Eu2+ and Mn2+. Those results suggest that Ba9Sc2Si6O24:Eu2+,Mn2+ can be a promising single phase phosphor for white light emitting diode (w-LED).

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