高温溶剂热分解法合成NaYF4∶Yb^3+,Er^3+纳米粒子及其光谱特性  

Synthesis and Spectral Properties of NaYF4∶Yb^3+,Er^3+Nanoparticles via Thermolysis Method

作　　者：李子娟 安雪 牛昊 闫景辉[1] 连洪洲[2] LI Zi-juan;AN Xue;NIU Hao;YAN Jing-hui;LIAN Hong-zhou(School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China;State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China)

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022 [2]中国科学院长春应用化学研究所,稀土资源利用国家重点实验室,吉林长春130022

出　　处：《发光学报》2020年第9期1128-1136,共9页Chinese Journal of Luminescence

基　　金：吉林省科技厅重大科技招标专项(20150203013YY);吉林省科技厅科技支撑计划重点项目(20120223);国家自然科学基金(51672266)资助项目。

摘　　要：以稀土氯化物为反应前驱体,采用高温溶剂法合成单分散、形貌和尺寸均一的NaYF4∶20%Yb^3+,2%Er^3+上转换发光纳米粒子。探讨了反应时间、温度以及油酸加入量对产物结构和光学性能的影响。通过XRD、SEM、EDS、XPS及光致发光等对产物性能进行表征。结果表明,样品与标准卡片匹配良好,为纯相,属六方晶系;所合成的纳米粒子形貌为六角盘状,对角线长度约为77 nm,厚度约为54 nm;在980 nm激光激发下,所合成纳米粒子在523 nm和542 nm左右的绿光区以及峰值位于656 nm左右的红光区均可观察到Er^3+的特征发射峰,分别归属于2H11/2、4S3/2及4F9/2能级到4I15/2能级之间的跃迁,不论是红光还是绿光吸收均为双光子过程。Mono-dispersed up-converting luminescent nanoparticles of NaYF4∶20%Yb^3+,2%Er^3+with uniform size and morphology were prepared via the thermolysis method using rare earth chloride as the precursor.The crystal structure,morphology,and upconversion properties of the samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),energy dispersive spectrometer(EDS),X-ray photoelectron spectroscopy(XPS)and photoluminescence spectrum.The results show that the samples belong to the hexagonal system(space group:P6)and therefore verifies the phase purity of the samples.The sample exhibits the morphology of hexagonal disc with a diagonal length of about 77 nm and a thickness of about 54 nm.Under the excitation of 980 nm laser,the samples exhibit characteristic emission of Er^3+peaked at 523 nm(green),542 nm(green)and 656 nm(red),which can be attributed to the transition from the level of 2H11/2,4S3/2 and 4F9/2 to the level of 4I15/2,respectively.Both absorption of green and red were due to two-photon processes.

关 键 词：高温溶剂热分解法 NaYF4∶Yb^3+ Er^3+ 纳米粒子 上转换发光 单分散 

分 类 号：O482.31[理学—固体物理]