纳米晶对Er^(3+):NaYF_4微晶玻璃发光特性的影响  

Effects of Nanocrystal on Luminescent Properties of Er^(3+):NaYF_4 Glass-ceramic

作　　者：黄兴勇[1] 陈大钦[2] 冯卓宏[1] 林林[1] 龚慧[1] 王元生[2] 郑志强[1] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福州350007 [2]中国科学院福建物质结构研究所,福州350002

出　　处：《硅酸盐学报》2011年第12期1997-2001,共5页Journal of The Chinese Ceramic Society

基　　金：福建省科技重大专项(2007HJ0004-2);福建省教育厅资助(JK2011008);福建省青年人才创新(2007F3027)资助项目

摘　　要：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。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.

关 键 词：微晶玻璃 前驱玻璃 纳米晶 发光特性 

分 类 号：O433[机械工程—光学工程]