β-NaYF_4:Yb^(3+),Er^(3+)上转换发光材料的可控合成及其发光性能  

Controlled synthesis and up-conversion luminescence properties of β-NaYF_4:Yb^(3+),Er^(3+) nanocrystals

作　　者：武利民[1] 李瑞霞[1] 付文强[1] 陈研文 杜红丽[1] 郭栋才[1] 

机构地区：[1]湖南大学化学化工学院,长沙410082 [2]湖南有色冶金劳动保护研究院,长沙410014

出　　处：《中国有色金属学报》2014年第7期1831-1838,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(J1103312;21341010);教育部创新团队资助项目(IRT1238);湖南省科学技术厅科技计划项目(2012GK3156)

摘　　要：采用水热法合成多种形貌和尺寸的NaYF4:Yb3+,Er3+上转换发光材料,探讨螯合剂、敏化剂、激活剂、氟化铵用量及水热时间对目标产物发光性能的影响规律,并通过正交实验优化Yb3+、Er3+共掺杂NaYF4上转换发光纳米材料的合成条件。采用XRD、SEM和荧光光谱对目标产物进行对比分析。结果表明:目标产物为β-NaYF4,在980 nm红外光的激发下,发出明亮的绿光,最强发射峰在542 nm。可通过改变螯合剂的种类来控制生成不同尺寸(纳米级或微米级)和形貌(管状、球形或六棱柱形)的目标产物。所制备的NaYF4:Yb3+/Er3+上转换发光材料分散性好、荧光强度高,在生物探针及生物成像等领域具有潜在的应用价值。NaYF4： Yb3＋, Er3＋ up-conversion （UC） luminescence materials with different shapes and sizes were obtained by a facile hydrotherrnal method. The effects of chelating agent, sensitizer concentration, activator concentration, NH4F concentration and the hydrothermal time on the 1 synthetic conditions were optimized by orthogonal experiments properties of the products were investigated. And the Then, the products were characterized by XRD and SEM. The results show that the minimum particle size of the sample is about 100 nm. The fluorescence spectra is also demonstrated, the results show that the products emit green fluorescence at 542 nm when they are excited by a 980 nm laser source, fl-NaYF4 with different shapes （tubular, nanospheres, hexagonal prisms） and sizes（from nano-scale to micro-scale） can be selectively synthesized in different chelating agents, fl-NaYF4： Yb3＋, Er3＋have the potential application in biological labeling and imaging for its strong UC emission intensity and better dispersion.

关 键 词：水热法 上转换 NAYF4 YB3+ ER3+ 发光性能 正交实验 

分 类 号：O614[理学—无机化学]