Color-tunable luminescence from single-phased Sr_3YNa(PO_4)_3F:Tb~(3+)/ Eu~(3+) phosphors with good energy transfer efficiency for white light emitting diodes

摘要

A novel Sr3YNa(PO4)(3)F:Tb3+, Eu3+ phosphor was prepared by high-temperature solid-state reaction method. The optical properties and luminescence mechanism were investigated in detail. The emission spectra and lifetime curve of Sr3Y0.92-yNa(PO4)(3)F:0.08Tb(3+), yEu(3+) phosphors indicate that there is efficient energy transfer between Tb3+ and Eu3+, and the mechanism is confirmed as dipole-quadrupole interaction. By adjusting the Tb3+, Eu3+ doping ratio, Sr3Y0.8Na(PO4)(3)F:0.08Tb(3+), 0.12Eu(3+) showed warm white light at color coordinates (0.3244, 0.3316). White light evidently relates to visible range.