Synthesis and luminescence properties of bluish-green emitting K2MgSi3O8:Eu2+ phosphor
来源期刊：Journal of Rare Earths2016年第1期
论文作者：唐惠东 杨蓉 黄彦林
文章页码：17 - 20
摘 要：Eu2+-doped K2 Mg Si3O8 phosphors were synthesized by conventional solid-state reaction method. The phase formation of as-prepared samples was characterized by X-ray powder diffraction. The luminescence properties were investigated by the photoluminescence excitation and emission spectra, decay curve and CIE coordinates. The phosphor showed bluish-green emission centered at 460 nm under the excitation of UV and near UV light with the wavelength range of 250–430 nm. Two Eu2+ emission centers existed in the K2 Mg Si3O8:Eu2+ phosphor according to the luminescence spectra and the decay curves. The critical quenching concentration of Eu2+ doping was determined to be 3.0 mol.% and the concentration quenching mechanism was dipole-dipole interactions between Eu2+ ions. These results suggested that K2 Mg Si3O8:Eu2+ was a potential bluish-green phosphor candidate for white UV-LED.
唐惠东1，杨蓉1，黄彦林2
1. Institute of Chemistry and Materials Engineering Changzhou Vocational Institute of Engineering2. College of Chemistry Chemical Engineering and Materials Science Soochow University
摘 要：Eu2+-doped K2 Mg Si3O8 phosphors were synthesized by conventional solid-state reaction method. The phase formation of as-prepared samples was characterized by X-ray powder diffraction. The luminescence properties were investigated by the photoluminescence excitation and emission spectra, decay curve and CIE coordinates. The phosphor showed bluish-green emission centered at 460 nm under the excitation of UV and near UV light with the wavelength range of 250–430 nm. Two Eu2+ emission centers existed in the K2 Mg Si3O8:Eu2+ phosphor according to the luminescence spectra and the decay curves. The critical quenching concentration of Eu2+ doping was determined to be 3.0 mol.% and the concentration quenching mechanism was dipole-dipole interactions between Eu2+ ions. These results suggested that K2 Mg Si3O8:Eu2+ was a potential bluish-green phosphor candidate for white UV-LED.
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