Effect of Sintering Time on Luminescent Properties of YAG:Ce3+ Phosphors
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第1期
论文作者：Xiong Zhaoxian Wu Wei Qiu Hong Song Chunxiao
Key words：phosphor; luminescent properties; rare earths;
Abstract: Phosphors of yttrium aluminium garnet activated by cerium ion, a kind of yellow luminescent materials for white LED lighting, were synthesized via solid-state reaction route in air and then reducing atmospheres.Thermal analysis was conducted by DTA/TGA.Moreover, XRD patterns of phosphors show that pure cubic phase of Y3 Al5 O12 is formed.Microstructures of the powders were observed by SEM.Luminescent spectra of the phosphors were also characterized by a spectrophotometer.The effect of sintering time on excitation and emission properties of the YAG: Ce3+ powders were systematically studied, resulting a best range of sintering time, 300 ～ 400 min, for maximal relative luminescent intensity.
Xiong Zhaoxian1，Wu Wei1，Qiu Hong1，Song Chunxiao1
(1.Department of Materials Science and Engineering, Xiamen University, Xiamen 361005, China)
Abstract:Phosphors of yttrium aluminium garnet activated by cerium ion, a kind of yellow luminescent materials for white LED lighting, were synthesized via solid-state reaction route in air and then reducing atmospheres.Thermal analysis was conducted by DTA/TGA.Moreover, XRD patterns of phosphors show that pure cubic phase of Y3 Al5 O12 is formed.Microstructures of the powders were observed by SEM.Luminescent spectra of the phosphors were also characterized by a spectrophotometer.The effect of sintering time on excitation and emission properties of the YAG: Ce3+ powders were systematically studied, resulting a best range of sintering time, 300 ～ 400 min, for maximal relative luminescent intensity.
Key words:phosphor; luminescent properties; rare earths;
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