Synthesis and luminescent properties of Ce³⁺ doped LuAG nano-sized powders by mixed solvo-thermal method

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• 作者：Linxiang WANG ; Min YIN ; Changxin GUO ; Weiping ZHANG
• 关键词：LuAG ; Ce³⁺ phosphors ; hydrothermal ; mixed solvo-thermal method ; photoluminescence ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2010
• 出版时间：February 2010
• 年：2010
• 卷：28
• 期：1
• 页码：16-21
• 全文大小：447 K

文摘

Polycrystalline LuAG: Ce³⁺ (cerium³⁺-doped lutetium aluminum garnet) powders were prepared by mixed solvo-thermal method. Fourier-transform IR spectroscopy (FTIR) and X-ray diffraction (XRD) measurements showed that the precursors were ethanol derivatives AlO(OH) crystal with hydroxyl and carbonate group. XRD results showed that phase of Lu₂O₃ disappeared with the precursors were annealed at 400 °C, cubic phase LuAG: Ce³⁺ appeared but only one diffraction peaks of LuAP (LuAlO₃) at calcination temperature to 700 °C, and the purified crystalline phase of LuAG:Ce³⁺ was obtained at 1000 °C. The scanning electron microscopy (SEM) analysis revealed that the synthesized LuAG:Ce³⁺ powders were uniform and had good dispersivity with an average particle size about 100 nm. Excitation and emission spectra of Ce³⁺ doped LuAG phosphors were measured. Many factors of affecting the intensity of emission spectra were discussed.