文献类型：期刊文献

中文题名：Ba^(2+),Al^(3+),Sr^(2+)掺杂YF_3∶Ho^(3+),Yb^(3+)上转换发光的研究

英文题名：Upconversion Luminescence Research of YF_3∶Ho^(3+),Yb^(3+) Doped with Ba^(2+),Al^(3+),Sr^(2+)

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：47

期号：5

起止页码：885

中文期刊名：人工晶体学报

外文期刊名：Journal of Synthetic Crystals

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

语种：中文

中文关键词：上转换;YF3;高温固相法;掺杂

外文关键词：upconversion;YF3;high temperature solid state;doped

摘要：为了提高上转换材料在激光防伪领域的绿光发射强度,采用高温固相法制备Ba^(2+)、Al^(3+)、Sr^(2+)掺杂YF_3∶Ho^(3+),Yb^(3+)材料。通过980 nm近红外激发的上转换发射光谱,可知Ba^(2+)、Al^(3+)、Sr^(2+)的掺杂都会使得晶格收缩,降低稀土离子周围晶体场的对称性,其546 nm绿光强度分别是未掺杂该金属离子样品的1.6倍、1.1倍、1.2倍。并根据X射线衍射(XRD)探究Ba^(2+)含量对晶相的作用。通过差热分析(DTA)、上转换发射光谱、XRD、扫描电子显微镜(SEM),结果表明:对于最佳Ba^(2+)、Al^(3+)、Sr^(2+)掺杂含量但不同烧结温度的样品,当合成温度为940℃时发光性能、结晶度和晶粒生长较好。通过发射强度与激发电流的拟合结果,说明546 nm绿光是双光子吸收过程,并阐述980 nm激发YF_3∶Ho^(3+),Yb^(3+)发光材料的能级跃迁过程。
Upconversion materials of YF3∶ Ho3＋,Yb3＋doped with Ba2＋,Al3＋,Sr2＋were prepared by high temperature solid state method in order to enhance green emission intensities in the field of laser anti-counterfeit. Ba2＋,Al3＋and Sr2＋could cause lattice shrinking,reduce crystal field symmetry around rare earth ions. The 546 nm green emission intensities of samples doped with Ba2＋,Al3＋,Sr2＋were 1.6,1. 1,1. 2 times as strong as the ones without the metal ions respectively according to upconversion emission spectra under 980 nm near-infrared excitation. The Ba2＋contents had effects on crystal phases with X-ray diffraction（XRD）. The results of Differential Thermal Analysis（DTA）, upconversion emission spectra,XRD,Scanning Electron Microscope（SEM） showed that optimal sintering temperature was 940 ℃ where optimal luminescence properties,crystallinities,grain growth appeared for samples with the optimal Ba2＋,Al3＋,Sr2＋doping content but different sintering temperatures. 546 nm green emission was two-photon absorption process with fitting results of emission intensity and excitation current. Energy level transition processes were represented for YF3∶ Ho3＋,Yb3＋luminescent materials under 980 nm excitation.