A series of reddish orange phosphors Ba3Gd1-x（PO4）3：xSm^3＋ （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 photolumi...A series of reddish orange phosphors Ba3Gd1-x（PO4）3：xSm^3＋ （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 4G5/2 - 6H7/2 transition of Sm^3＋. Optimal concentration of Sm^3＋ in the phosphors is about 6.0 at%. The quantum yield of the Ba3Gdo.94（PO4）3：0.06Sm^3＋ under excitation at 403 nm is about 52.07%. Temperature dependent photoluminescence spectra of the Ba3Gdo.94（PO4）3：0.06Sm^3＋ were measured and the phosphor exhibits high thermal stability of emission. All the results show that the Ba3Gd（PO4）3：Sm^3＋ phosphor may be a potential red phosphor for near-UV based white LEDs.展开更多
基金Project supported by the National Key Research and Development Program of China(2016YFB0701002)
文摘A series of reddish orange phosphors Ba3Gd1-x（PO4）3：xSm^3＋ （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 4G5/2 - 6H7/2 transition of Sm^3＋. Optimal concentration of Sm^3＋ in the phosphors is about 6.0 at%. The quantum yield of the Ba3Gdo.94（PO4）3：0.06Sm^3＋ under excitation at 403 nm is about 52.07%. Temperature dependent photoluminescence spectra of the Ba3Gdo.94（PO4）3：0.06Sm^3＋ were measured and the phosphor exhibits high thermal stability of emission. All the results show that the Ba3Gd（PO4）3：Sm^3＋ phosphor may be a potential red phosphor for near-UV based white LEDs.
