Abstract
In this work, a series of Ba3P4O13:Sm3+ phosphors are prepared via calcining the precursor synthesized by a chemical co-precipitation method, meanwhile, the phase and fluorescence properties are characterized as required. The results demonstrate that the phosphors emit orange-red light with several emission peaks centering at 564 nm, 600 nm and 648 nm under ultraviolet (UV) excitation, which originate from the transition of 4G5/2 to 6H5/2 (or 6H7/2,6H9/2) energy level in Sm3+. Among them, Ba2.98P4O13:0.02Sm3+ phosphor exhibit the strongest emission intensity, and then concentration quenching occurs due to the d-d interaction once the concentration of Sm3+ ions exceeded 0.02. Even so, the color coordinates of all BaP4O13:Sm3+ samples are calculated to be close to (0.58, 0.41), implying a high color purity. Significantly, the charge compensation of alkali metal ions, especially for K+ ion, enhances the emission intensity, thermal stability and fluorescence lifetime of the phosphors remarkably, even zero thermal quenching is observed in the range of 25–250 °C.
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