Luminescence properties of phosphate phosphors Ba₃Gd_1-x（PO₄）₃:xSm³⁺

Honghui Li^1,2，Xinghong Gong¹，Yujin Chen¹，Jianhua Huang¹，Yanfu Lin¹，Zundu Luo¹，Yidong Huang¹

1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences2. Fujian Normal University

摘 要：A series of reddish orange phosphors Ba₃Gd_1-x（PO₄）₃:xSm³⁺（x = 0.02.0.04,...,0.12） were prepared by the high-temperature solid-state reaction. X-ray powder diffraction（XRD） and diffuse reflectance and photoluminescence spectra were utilized to characterize the structure and spectral properties of the phosphors. The phosphors have strong absorption in the near-UV region. CIE chromaticity coordinates of the phosphors are located in the reddish orange region since the strongest emission band is around 598 nm and related to the ⁴ G_5/2→⁶ H_7/2 transition of Sm³⁺. Optimal concentration of Sm³⁺ in the phosphors is about 6.0 at%. The quantum yield of the Ba₃Gd_0.94（PO₄）₃:0,06 Sm³⁺ under excitation at 403 nm is about 52.07%. Temperature dependent photoluminescence spectra of the Ba₃Gd_0.94（PO₄）₃:0.06 Sm³⁺ were measured and the phosphor exhibits high thermal stability of emission. All the results show that the Ba₃Gd（PO₄）₃:Sm³⁺ phosphor may be a potential red phosphor for near-UV based white LEDs.

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