Oxonitridosilicate phosphors with compositions of Y 1-xCexSiO2N （x=0-0. 1） were synthesized by a new synthetic route based on a solid state reaction among YSi, CeSi, SiO2 and Y203 compounds at high temperature and h...Oxonitridosilicate phosphors with compositions of Y 1-xCexSiO2N （x=0-0. 1） were synthesized by a new synthetic route based on a solid state reaction among YSi, CeSi, SiO2 and Y203 compounds at high temperature and high pressure. The photohtminescence properties dependent on Ce concentration and temperature were investigated. Concentration quenching occurred when the doped Ce3＋ concentration was more than 3 tool.%. The emission spectra showed red shifts from 430 to 447 nm with the increased Ce concentration from 0.5 mol.% to 10 mol.%. The quenching temperature was estimated as ~380 K. The chromaticity coordinates of the excitation and emission spectra were stable against the temperature. This study showed these YSiO2N：Ce3＋ phosphors the potential applications in the three-RGB phosphor-converted white LEDs.展开更多
基金Project supported by National Natural Science Foundation of China (90922027, 51202053)National High Technology Research and Development Program of China (2009AA03Z432)Science and Technology Research Program of Hebei Education Department of China (Q2012061)
文摘Oxonitridosilicate phosphors with compositions of Y 1-xCexSiO2N （x=0-0. 1） were synthesized by a new synthetic route based on a solid state reaction among YSi, CeSi, SiO2 and Y203 compounds at high temperature and high pressure. The photohtminescence properties dependent on Ce concentration and temperature were investigated. Concentration quenching occurred when the doped Ce3＋ concentration was more than 3 tool.%. The emission spectra showed red shifts from 430 to 447 nm with the increased Ce concentration from 0.5 mol.% to 10 mol.%. The quenching temperature was estimated as ~380 K. The chromaticity coordinates of the excitation and emission spectra were stable against the temperature. This study showed these YSiO2N：Ce3＋ phosphors the potential applications in the three-RGB phosphor-converted white LEDs.
