Concentration and annealing effect on PL properties of sol-gel derived SiO2-Y2O3:Eu3+ nanocomposites
来源期刊：JOURNAL OF RARE EARTHS2010年第2期
论文作者：王忆 曾庆光 胡社军 吴坤彬 蒋俊宏 吴坤彬
文章页码：176 - 180
摘 要：An improved sol-gel method was employed to prepare Eu3+ ions doped SiO2-Y2O3 nanocomposites.Systematic study was carried out on the effect of post-annealing treatment on photoluminescence（PL） properties of the samples under various europium ions doping concentrations.X-ray diffraction（XRD） patterns indicated that the samples showed an amorphous matrix structure,and the scanning electron microscopy（SEM） pictures showed that the samples presented a nano size（from 21 to 42 nm） granular-stack structure after high-temperature annealing treatment（from 600 to 900 °C,respectively） for 3 h.Raman spectra demonstrated that Y3+ and Eu3+ ions were incorporated into the composites through the sol-gel and post-annealing process.Under the excitation of 394 nm（7F0→5L6） light,red emission was observed around 613 nm（5D0→7F2）.Without annealing treatment,the optimized doping amount of Eu ions was about 6.5 mol.%,which was much higher than that single doped in SiO2 glass matrix with Eu ions concentration of 3%,and it raised to 9.0% when the samples were annealed at high-temperature（900 °C） annealing.
王忆1，曾庆光1，胡社军1，吴坤彬2，蒋俊宏2，陈根廷2
1. Institute of Thin Film and Nano Materials,Wu Yi University(Jiangmen)2. Department of Chemical and Enviromental Engineering,Wu Yi University(Jiangmen)
摘 要：An improved sol-gel method was employed to prepare Eu3+ ions doped SiO2-Y2O3 nanocomposites.Systematic study was carried out on the effect of post-annealing treatment on photoluminescence（PL） properties of the samples under various europium ions doping concentrations.X-ray diffraction（XRD） patterns indicated that the samples showed an amorphous matrix structure,and the scanning electron microscopy（SEM） pictures showed that the samples presented a nano size（from 21 to 42 nm） granular-stack structure after high-temperature annealing treatment（from 600 to 900 °C,respectively） for 3 h.Raman spectra demonstrated that Y3+ and Eu3+ ions were incorporated into the composites through the sol-gel and post-annealing process.Under the excitation of 394 nm（7F0→5L6） light,red emission was observed around 613 nm（5D0→7F2）.Without annealing treatment,the optimized doping amount of Eu ions was about 6.5 mol.%,which was much higher than that single doped in SiO2 glass matrix with Eu ions concentration of 3%,and it raised to 9.0% when the samples were annealed at high-temperature（900 °C） annealing.
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