A white light emitting luminescent material Ba3Y(PO4)3:Dy3+

The novel white emitting phosphors Ba3Y1−x(PO4)3:xDy3+ have been synthesized by conventional solid-state reaction. The structure of the compound was confirmed by the XRD technique. Under the excitation of 348 nm, the peaks of the emission spectra of Dy3+ ions are located at 486 nm (blue), 575 nm (yellow) and 668 nm (red) corresponding to the magnetic dipole 4F9/2–6H15/2 transition, the electric dipole 4F9/2–6H13/2 transition and 4F9/2–6H11/2 transition. Concentration quenching occurs when the Dy3+ concentration is beyond 8 mol%. The critical transfer distance is calculated to be about 18.98 Å and the major concentration self-quenching mechanism of Ba3Y(PO4)3:Dy3+ is the dipole–dipole interaction. The chromaticity coordinates (x=0.3475, y=0.3815) of the as-obtained Ba3Y(PO4)3:Dy3+ phosphors are very close to the “ideal white” (x=0.33, y=0.33). The research results indicate that the Ba3Y1−x(PO4)3:xDy3+ phosphor may be a promising single-component phosphor in the field of solid state lighting in lamp industry.