Luminescence properties of Ce3+ and/or Mn2+ activated Ca10K(PO4)7 under ultraviolet and vacuum ultraviolet excitation

► The Ce3+, Mn2+ doped Ca10K(PO4)7 can be excited efficiently by VUV-UV light. ► The Ce3+, Mn2+ activated Ca10K(PO4)7 are emission-tunable. ► The energy transfer among defects, Ce3+ and Mn2+ was observed and studied. ► This work can provide useful basic data for further work for phosphor study.