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

Abstract The novel white emitting phosphors Ba 3 Y 1− x (PO 4 ) 3 : x Dy 3+ 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 Dy 3+ ions are located at 486 nm (blue), 575 nm (yellow) and 668 nm (red) corresponding to the magnetic dipole 4 F 9/2 – 6 H 15/2 transition, the electric dipole 4 F 9/2 – 6 H 13/2 transition and 4 F 9/2 – 6 H 11/2 transition. Concentration quenching occurs when the Dy 3+ concentration is beyond 8 mol%. The critical transfer distance is calculated to be about 18.98 A and the major concentration self-quenching mechanism of Ba 3 Y(PO 4 ) 3 :Dy 3+ is the dipole–dipole interaction. The chromaticity coordinates ( x =0.3475, y =0.3815) of the as-obtained Ba 3 Y(PO 4 ) 3 :Dy 3+ phosphors are very close to the “ideal white” ( x =0.33, y =0.33). The research results indicate that the Ba 3 Y 1− x (PO 4 ) 3 : x Dy 3+ phosphor may be a promising single-component phosphor in the field of solid state lighting in lamp industry.