纳米晶对Er3＋：NaYF4微晶玻璃发光特性的影响

采用熔融–急冷法制备成分相同的Er3＋：NaYF4前驱玻璃和纳米晶微晶玻璃,在室温测量样品的吸收光谱、发射光谱及荧光寿命,研究纳米晶对Er3＋：NaYF4微晶玻璃发光特性的影响。结果表明：经过可控晶化处理后,样品中形成了20～25nm的纳米晶粒,Er3＋的Judd–Ofelt强度参量2、4和6均明显减小,确认晶化处理后稀土离子已掺入微晶玻璃的纳米晶颗粒中;晶化处理后,稀土离子的红光发射、上转换荧光和1.5μm荧光均有不同程度的增强效应;不同方式的荧光衰减曲线拟合结果证实Er3＋并未完全掺入纳米晶颗粒,计算得到约有88.16%的稀土离子掺入到了纳米晶颗粒。...

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Published in硅酸盐学报 Vol. 39; no. 12; pp. 1997 - 2001
Main Author 黄兴勇 陈大钦 冯卓宏 林林 龚慧 王元生 郑志强
Format Journal Article
LanguageChinese
Published 2011
Subjects
前驱玻璃
发光特性
微晶玻璃
纳米晶
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Summary:采用熔融–急冷法制备成分相同的Er3＋：NaYF4前驱玻璃和纳米晶微晶玻璃,在室温测量样品的吸收光谱、发射光谱及荧光寿命,研究纳米晶对Er3＋：NaYF4微晶玻璃发光特性的影响。结果表明：经过可控晶化处理后,样品中形成了20～25nm的纳米晶粒,Er3＋的Judd–Ofelt强度参量2、4和6均明显减小,确认晶化处理后稀土离子已掺入微晶玻璃的纳米晶颗粒中;晶化处理后,稀土离子的红光发射、上转换荧光和1.5μm荧光均有不同程度的增强效应;不同方式的荧光衰减曲线拟合结果证实Er3＋并未完全掺入纳米晶颗粒,计算得到约有88.16%的稀土离子掺入到了纳米晶颗粒。
Bibliography:Precursor glass of Er3＋ ：NaYF4 and nanostructured glass-ceramic, which have the same composition, were fabricated by conventional melt-quenching method. Absorption, emission spectra, and fluorescence lifetime of samples at room temperature were measured. Effects of nanocrystalline on luminescent properties of samples were also studied. Results indicate that 20–25 nm nano- crystalline has formed and Judd–Ofelt intensity parameters 2,4,and 6 decrease greatly after crystallization, with more Er3＋ in- corporated into NaYF4 crystalline phase. Meanwhile, red fluorescent emissions, up-conversion fluorescence, and 1.5 μm emission of Er3＋ increase with different degrees by crystallization. The results of different decay curve fitting method suggest that Er3＋ is not com- pletely incorporated into NaYF4 crystalline phase. As calculated from the fitted curve, about 88.16% of rare earth ions were parti- tioned into NaYF4 crystals.
glass-ceramic; precursor glass; nanocrystal; luminescent property
HUANG Xingyong 1 ,CHEN Daqin
ISSN:0454-5648