Synthesis and luminescent properties of Ba2V2O7:Sm3+
来源期刊：JOURNAL OF RARE EARTHS2017年第2期
论文作者：李飞 方宏威 陈永虎
文章页码：135 - 141
摘 要：Samarium doped pyrovanadate Ba2V2O7:Sm3+ 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 Ba2V2O7 and three narrow peaks（at 561, 599 and 646 nm） attributed to the dopant Sm3+ ions. The PL spectra revealed the energy transfer from the host to the Sm3+ ions. In addition, the color coordinates and the color temperature of the phosphor Ba1.95V2O7:5%Sm3+ 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.
李飞，方宏威，陈永虎
Department of Physics, University of Science and Technology of China
摘 要：Samarium doped pyrovanadate Ba2V2O7:Sm3+ 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 Ba2V2O7 and three narrow peaks（at 561, 599 and 646 nm） attributed to the dopant Sm3+ ions. The PL spectra revealed the energy transfer from the host to the Sm3+ ions. In addition, the color coordinates and the color temperature of the phosphor Ba1.95V2O7:5%Sm3+ 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.
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