文献类型：期刊文献

中文题名：Mg^(2+)的掺杂对YF_3:Er^(3+),Yb^(3+)材料上转换发光的影响

英文题名：Effects of Mg^(2+) Doping on Upconversion Luminescence of YF_3:Er^(3+), Yb^(3+) Materials

作者：张磊[1];范亚蕾[1];黄月霞[1];王德强[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2018

卷号：39

期号：6

起止页码：703

中文期刊名：陶瓷学报

外文期刊名：Journal of Ceramics

收录：CSTPCD;;北大核心:【北大核心2017】；

语种：中文

中文关键词：YF3;上转换;Er3+;掺杂

外文关键词：YF3;upconversion;Er^3+;doped

摘要：采用高温固相法制备Mg^(2+)掺杂YF_3:Er^(3+),Yb^(3+)材料,以增大其在激光防伪领域的发射强度。通过980 nm半导体激光器激发的上转换发射光谱,可知Mg^(2+)含量为1.0mol%时,其548 nm绿光和660 nm红光强度分别是未掺杂Mg^(2+)样品的1.5倍和1.4倍。Mg^(2+)的掺杂使得晶格产生收缩,降低Er^(3+)和Yb^(3+)周围晶体场对称性,增大4f-4f跃迁几率。并通过X射线衍射(XRD)探讨Mg^(2+)含量对晶相的影响。通过差热分析(DTA)、发射光谱、XRD、扫描电子显微镜(SEM),对于Mg^(2+)含量均为1.0mol%但不同烧结温度的样品,合成温度为940℃时光强、结晶度、晶粒生长较好。通过荧光寿命曲线以及发射强度与激发电流的拟合结果,探讨548 nm绿光和660 nm红光的发光机理,并分析980 nm激发YF_3:Er^(3+),Yb^(3+)材料的能级跃迁过程。
YF3:Er^3+,Yb^3+materials doped with Mg^2+were synthesized by high temperature solid state method so as to enhance emission intensities for laser anti-counterfeit applications.The 548 nm green and 660 nm red emission intensities of the samples doped with 1.0mol%Mg^2+were 1.5 and 1.4 times as strong as the ones without Mg^2+respectively according to the upconversion emission spectra under 980 nm diode laser excitation.Mg^2+could cause lattice shrinking,reduce crystal field symmetry around Er^3+and Yb^3+,increasing the 4f-4f transition probabilities.The influence of the Mg^2+content on crystalline phases was characterized by X-ray diffraction(XRD).The results of differential thermal analysis(DTA),emission spectra,XRD,and scanning electron microscope(SEM)showed among all the samples with 1.0mol%Mg^2+but sintered at different temperatures those sintered at 940°C had the optimal emission intensities,crystallinities and grain growth.The upconversion luminescence mechanisms of 548 nm green and 660 nm red emission were discussed with fluorescent lifetime curves and fitting results of emission intensity and excitation current.Energy level transition processes were analyzed for YF3:Er^3+,Yb^3+materials under 980nm excitation.