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Samarium doped pyrovanadate Ba_2V_2O_7:Sm~(3+) phosphors were synthesized by traditional high-temperature solid-state reaction method. The phase and the structure of the samples were characterized by powder X-ray diffraction(XRD), and the luminescent properties and the energy transfer mechanism of the material were investigated using quantitative photoluminescence(PL) spectroscopy. The excitation spectrum of the sample exhibited a broad ultraviolet(UV) band with maximum at around 341 nm due to V–O charge transfer transition of the host. The emission spectrum displayed a yellow-greenish broadband(peaking at around 498 nm) coming from the host Ba_2V_2O_7 and three narrow peaks(at 561, 599 and 646 nm) attributed to the dopant Sm~(3+) ions. The PL spectra revealed the energy transfer from the host to the Sm~(3+) ions. In addition, the color coordinates and the color temperature of the phosphor Ba_(1.95)V_2O_7:5%Sm~(3+) were(0.314, 0.365) and 6135 K, respectively, under 365 nm excitation, suggesting it to be a candidate of single-phase converting phosphors for white-light-emitting diodes(WLEDs) with near-UV chips.
Samarium doped pyrovanadate Ba_2V_2O_7: Sm ~ (3+) phosphors were synthesized by traditional high-temperature solid-state reaction method. The phase and the structure of the samples were characterized by powder X-ray diffraction (XRD) the energy transfer mechanism of the material were investigated using quantitative photoluminescence (PL) spectroscopy. The excitation spectrum of the sample exhibited a broad ultraviolet (UV) band with maximum at around 341 nm due to V-O charge transfer transition of the host. emission spectrum displayed a yellow-greenish broadband (peaking at around 498 nm) coming from the host Ba_2V_2O_7 and three narrow peaks (at 561, 599 and 646 nm) attributed to the dopant Sm ~ (3+) ions. The PL spectra revealed the In addition, the color coordinates and the color temperature of the phosphor Ba_ (1.95) V_2O_7: 5% Sm ~ (3+) were (0.314, 0.365) and 6135 K, respectively, under 365 nm excitation, suggesting it to be a candidate of single-phase converting phosphors for white-light-emitting diodes (WLEDs) with near-UV chips.