A series of color-tunable emitting Na _(3) Sc _(2) (PO _(4) ) _(3) :Ce ~(3+) /Tb ~(3+) /Eu ~(3+) (NSPO) phosphors were prepared by a combination of hydrothermal synthesis and low temperature calcination. The phase structure, photoluminescence and energy transfer properties of the samples were studied in detail. The tunable colors were obtained by co-doping the Tb ~(3+) ions into the NSPO:Ce ~(3+) or NSPO:Eu ~(3+) phosphors with varying concentrations. Under UV excitation, the energy transfers from Tb ~(3+) to Eu ~(3+) in the NSPO host occurred mainly via a dipole–dipole mechanism, and the critical distances of the ion pairs ( R _(c) ) was calculated to be 17.94 ? by the quenching concentration method. And that, the emission colors of the NSPO:Tb ~(3+) ,Eu ~(3+) phosphors could be adjusted from green through yellow to red because of the energy transfer from Tb ~(3+) to Eu ~(3+) . Based on its good photoluminescence properties and abundant emission colors, the NSPO:Ce ~(3+) /Tb ~(3+) /Eu ~(3+) phosphors might be promising as potential candidates for solid-state lighting and display fields.
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