近红外光诱导下NaYbF4：Tm^3＋,Eu^3＋体系中Eu^3＋的上转换发光  

Upconversion Luminescence of Eu^(3+) in NaYbF_4:Tm^(3+),Eu^(3+) Nanocrystals Induced by 980 nm Excitation

作　　者：刘叶[1] 于放达[1] 刘树森[1] 赵丹[1] 何春凤[1] 郑克志[1] 秦伟平[1] 

机构地区：[1]吉林大学电子科学与工程学院集成光电子国家重点联合实验室,吉林长春130012

出　　处：《发光学报》2012年第5期476-480,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51072065);吉林省科技发展计划(201105004,20100702)资助项目

摘　　要：利用水热法制备得到NaYbF4∶0.01%Tm3+,20%Eu3+上转换材料,利用X射线衍射分析、扫描电子显微镜及光谱测试技术分别对其进行了结构、形貌以及光谱性质的表征。在980 nm近红外激光激发下,得到了Eu3+的可见到紫外范围的上转换荧光发射。分析表明:共掺杂NaYbF4纳米材料中Tm3+到Eu3+离子的能量传递对布居Eu3+离子的激发态能级,获得Eu3+的上转换发光起着至关重要的作用。另外,在实验中首次获得了Eu3+对应于3P0→7Fj(j=0,1,2)能级跃迁的上转换光发射。NaYbF4∶0.01%Tm3＋,20%Eu3＋ nanocrystals were synthesized by hydrothermal method.The crystalline phase,morphology,and optical properties were characterized by X-ray diffraction,scanning electron microscope and luminescent spectra.The samples are nano-rods with uniform size distribution.Their length is 500 nm and diameter is 200 nm on average.Under 980 nm near-infrared laser excitation,ultraviolet and visible upconversion luminescence of Eu3＋ was obtained.In the codoped NaYbF4 nano-rods,the energy transfer from Tm3＋ to Eu3＋ and the bridging effect of Tm3＋ ions play important roles in populating the high-energy excited states of Eu3＋.Furthermore,the upconversion emissions from 3P0→7Fj（j=0,1,2） of Eu3＋ were observed for the first time.

关 键 词：铕 纳米材料 紫外 上转换 发光 

分 类 号：O482.31[理学—固体物理]