Study on co-precipitation synthesized Y3Al5O12:Ce yellow phosphor for white LED
来源期刊：Journal of Rare Earths2010年第5期
论文作者：张书生 庄卫东 何涛 刘元红 刘荣辉 高文贵 胡运生 龙震
文章页码：713 - 716
摘 要：A precursor of the Y3Al5O12:Ce （YAG:Ce） phosphor was obtained by co-precipitation of the solution of high purity nitrates with ammonium bicarbonate solution. The precipitation process of the precursor was studied in this work. YAG:Ce yellow phosphors with fine morphology was synthesized by annealing the precursor at a reducing atmosphere. The crystal phase, microstructure of the phosphors and their photoluminescence were investigated. The results indicated that the pure phase of YAG:Ce could be obtained at 1673 K annealing temperature. The particles of phosphor were basically spherical in shape with the mean size less than 2 μm. The excitation spectrum showed a broad and strong absorption band at about 460 nm, compatible with the excited wavelength of commercial blue light emitting diode （LED） for white LED lighting. Bright yellow-emission located at 540 nm was observed.
张书生，庄卫东，何涛，刘元红，刘荣辉，高文贵，胡运生，龙震
National Engineering Research Center for Rare Earth Materials, General Research Institute for Non-Ferrous Metals, and Grirem Advanced Materials Co., Ltd.
摘 要：A precursor of the Y3Al5O12:Ce （YAG:Ce） phosphor was obtained by co-precipitation of the solution of high purity nitrates with ammonium bicarbonate solution. The precipitation process of the precursor was studied in this work. YAG:Ce yellow phosphors with fine morphology was synthesized by annealing the precursor at a reducing atmosphere. The crystal phase, microstructure of the phosphors and their photoluminescence were investigated. The results indicated that the pure phase of YAG:Ce could be obtained at 1673 K annealing temperature. The particles of phosphor were basically spherical in shape with the mean size less than 2 μm. The excitation spectrum showed a broad and strong absorption band at about 460 nm, compatible with the excited wavelength of commercial blue light emitting diode （LED） for white LED lighting. Bright yellow-emission located at 540 nm was observed.
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