Dual emission of Ce ,Mn -coactivated Ca YNa(PO ) F via energy transfer: a single component white/yellow-emitting phosphor.

A series of Ce ,Mn -coactivated Ca YNa(PO ) F phosphors were synthesized via a traditional solid-state reaction under a reductive atmosphere. X-Ray powder diffraction was used to confirm that the crystal structure and diffraction peaks of Ce /Mn -doped samples matched well with the standard data. A spectral overlap between the emission band of Ce and the excitation band of Mn suggested the occurrence of energy transfer from Ce to Mn .