Synthesis And Luminescence Properties Of Novel Borate Compounds

For rare earth element has unique electron-shell structure, it is widely used as the fluorescent material. The advantages of rare earth luminescent material are strong absorbing ability and high conversion rate. Especially it has the high emissive power and stable physicochemical property in visible region.Rare-earth Borate is one of the important research system and has been used in lighting industry. Such as some Rare-earth Borates LnBO3:M(Ln=La, Gd, Lu, Sc;M=Eu3+,Tb3+) and so onare regarded as a kind of important VUV fluorescent material because of its high luminous efficiency through stimulated by VUV.The content of experience in this paper are divided into three parts.First, adopting hydrothermal method,drop the carbon with different quantity into Zn3.67:Eu0.22[B2O7]·H2O. By some characterization tests of Infrared (IR), X-ray powder diffraction, scanning electron microscope, fluorescence spectrum and CIE chromaticity analysis and so on, morphology and luminescent properties can be studied. And it can be also found that the amount of glucose has a certain effect on morphology and luminescent properties of chemical compound. The result scanned by electron microscope shows morphology of compound can change regular with increase of the amount of glucose. In fluorescence spectra, when the percentage of Eu/Zn is 6.5%, and the amount of glucose is 0.5 g, red light can be the highest under the excitation of 505nm wavelength. Result from CIE chromaticity analysis presents that fluorescence released by compound is located in red zone, and its chromaticity is pure.Second, adopting hydrothermal method, drop the carbon with different quantity into Zn3.55:Tb0.3[B2O7]·H2O. By some characterization tests of Infrared (IR), X-ray powder diffraction, scanning electron microscope, fluorescence spectrum and CIE chromaticity analysis and so on, morphology and luminescent properties can be studied. And also it can be found that the amount of glucose has a certain effect on morphology and luminescent properties of chemical compound. The result scanned by electron microscope shows morphology of compound can change regular with increase of the amount of glucose. In fluorescence spectra, when the percentage of Tb/Zn is 8.5%, and the amount of glucose is 0.4g, the emission spectrum of compound can be highest, and it can give out the good green light. What’s more, result from CIE chromaticity analysis presents that fluorescence released by compound is located in green zone, and its chromaticity is pure.Thirdly, adopting hydrothermal method, drop the different concentration ratio of rare-earth ions into Zn4[B2O7]·H2O. By some characterization tests of Infrared (IR), X-ray powder diffraction, scanning electron microscope, fluorescence spectrum and CIE chromaticity analysis and so on, morphology and luminescent properties can be studied. And also it can be found that doping of rare-earth ions has a certain effect on morphology and luminescent properties of chemical compound. The result scanned by electron microscope shows morphology of compound can change regularly with increase of concentration ratio of rare-earth ions. It can be found by fluorescence emission spectrum analysis that compounds can give out green, red and blue lights, so this compound can release white light. CIE chromaticity analysis presents that fluorescence released by compound is located in white zone, and its chromaticity is pure.