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A series of Sm~(3+) doped KMgLa(PO_4)_2 have been prepared via a high-temperature solid-state method.The phase of the phosphor was characterized by X-ray diffraction,and the spectra of phosphors were measured by the fluorescence spectrophotometer.Under 402 nm near-ultraviolet excitation,KMgLa(PPO_4)_2:Sm~(3+) shows orange-red emission,and the emission peak locates at 600 nm,which is associated to the ~4G_(2/5)→~6H_(9/2) transition of Sm~(3+).The emission intensity of phosphors can be tuned by changing the Sm~(3+) concentration,and the optimal Sm~(3+) doping concentration is about0.01.The concentration quenching phenomenon was observed in KMgLa(PO_4)_2:Sm~(3+),and the critical distance is calculated to be about 3.082 nm.The CIE chromaticity coordinates of phosphors shift from red to pink with the Sm~(3+) concentration increasing.All the results suggest that it could be a potential application in white LEDs manufacture.
A series of Sm ~ (3 +) doped KMgLa (PO_4) _2 have been prepared via a high-temperature solid-state method. The phase of the phosphor was characterized by X-ray diffraction, and the spectra of phosphors were measured by the (3) shows orange-red emission, and the emission peak locates at 600 nm, which is associated with the ~ 4G_ (2/5) → ~ 6H_ (9/2) transition of Sm ~ (3 +). The emission intensity of phosphors can be tuned by changing the Sm ~ (3+) concentration, and the optimal Sm ~ (3+) doping concentration is about 0. The concentration quenching phenomenon was observed in KMgLa (PO 4) 2: Sm ~ (3 +), and the critical distance is calculated to be about 3.082 nm. The CIE chromaticity coordinates of phosphors shift from red to pink with the Sm ~ ( 3+) concentration increasing.All the results suggest that it could be a potential application in white LEDs manufacture.