NaGdF_4:Nd^(3+)纳米球和纳米棒的热淬灭特性  

Thermal Quenching Characteristics of NaGdF_4:Nd^(3+) Nanoparticles and Nanorods

作　　者：代江云 冯国英[1] 陈蛟[1] 殷家家[1] 周寿桓[1,2] 

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]华北光电技术研究所,北京100015

出　　处：《中国激光》2014年第2期283-287,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(10976017)

摘　　要：采用水热法制备出了掺钕四氟化钆钠(NaGdF4:Nd3+)纳米球和纳米棒。用X射线衍射(XRD)仪和扫描电镜(SEM)对纳米晶的晶型结构以及形貌进行了表征。研究了纳米晶在室温下的发光特性,并与体材料作对比。对于Nd3+发光的热淬灭特性,拟合了纳米晶和体材料在变温荧光下的实验数据。发现与体材料相比,NaGdF4:Nd3+纳米晶具有更小的热淬灭速率,纳米球与纳米棒的热淬灭速率相近。NaGdF4：Nd3＋ nanoparticles and nanorods are synthesized by hydrothermal method. X-ray diffraction （XRD） and scanning electron microscope（SEM） are used to characterize the crystal strcucture and morphologies of these nanocrystals, respectively. Their luminescent properties at room temperature are studied and compared with those of the bulk powders. In particular, thermal queching characteristics for the luminescence of Nda＋ are studied, and the temperature dependence of luminescence of NaGdF4：Nd3＋ nanocrystals and bulk powders are fitted. It is observed that the thermal quenching rate in NaGdF4：Nd3＋ nanocrystals is lower than that in the bulk powders, and the thermal quenching rate in nanoparticles is close to that in nanorods.

关 键 词：材料 稀土掺杂纳米晶 光谱的温度关系 热淬灭 

分 类 号：O436[机械工程—光学工程]