Luminescence and energy transfer of single-phase white-emitting phosphor Ba2Mg(PO4)2:Ce3+, Eu2+ for white LEDs

Abstract

A series of Ba₂Mg(PO₄)₂:Ce³⁺, Eu²⁺ phosphors were synthesized by the traditional high temperature solid-state method, and the crystal structures and luminescence properties of the samples were discussed systematically. The energy transfer from Ce³⁺ to Eu²⁺ in Ba₂Mg(PO₄)₂ was proved to be of resonant type via a dipole–dipole interaction mechanism. With a precisely controlled relative proportion of Ce³⁺/Eu²⁺, the emission color of the samples can vary from blue (0.157, 0.071) to white (0.352, 0.332) and ultimately to yellow (0.452, 0.466) under the 323 nm ultraviolet light radiation excitation. The result reveals that the Ba₂Mg(PO₄)₂:Ce³⁺, Eu²⁺ phosphor may have potential application as a single-phased white-emitting phosphor for light emitting diodes.