Er^(3+)、Eu^(3+)双掺杂LaOF荧光粉的光学性能研究及防伪应用  

Optical properties study and anti-counterfeiting application of Er^(3+),Eu^(3+)co-doped LaOF phosphors

作　　者：李翔[1] 史忠祥 王晶[1] 贾宇盟 LI Xiang;SHI Zhongxiang;WANG Jing;JIA Yumeng(Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powders,Dalian Jiaotong University,Dalian,Liaoning 116028,China)

机构地区：[1]大连交通大学辽宁省无机超细粉体制备及应用重点实验室,辽宁大连116028

出　　处：《光电子．激光》2024年第6期631-640,共10页Journal of Optoelectronics·Laser

基　　金：中国石油天然气股份有限公司石油化工研究院项目(2021210207000265)资助项目。

摘　　要：有机发光材料可能对人体或环境造成影响,除此之外还有生产成本高、发光易淬灭、发光强度与颜色不易于控制的缺点,因此探索性能优越的稀土发光材料并寻找其应用价值是具有重要意义的。本文基于水热辅助固相法制备出Er^(3+)、Eu^(3+)离子共掺杂LaOF荧光粉,通过X射线衍射仪(X-ray diffractometer,XRD)、扫描电镜(scanning electron microscope,SEM)和荧光分析仪对不同Er^(3+)掺杂浓度下的LaOF∶Eu^(3+)荧光粉体的相组成、粒径尺寸、形貌及荧光光谱进行表征与分析。结果表明:在900℃的温度下煅烧,物相由前驱体LaF3转变为四方相LaOF,且随着Er^(3+)掺杂浓度的升高,在365 nm与393 nm波长激发下均呈现出多色可调谐的发光特性,其中365 nm激发下呈现自橙色光向黄色光的转变,而在393 nm光辐射下则由橙色光向品红色光过渡。将Er^(3+)、Eu^(3+)共掺杂LaOF荧光粉制成油墨并印制成图案后,当其受激于365 nm与395 nm激发光时,可分别呈现肉眼可辨的橙色和紫色光发射,表明所制备的荧光粉有望在防伪领域具有一定的应用前景。Organic light-emitting materials may have an impact on the human body or the environment.In addition,they also have the disadvantages of high production cost,easy quenching of lighting,and difficult control of lighting intensity and color.Therefore,it is of great significance to explore rare earth luminescent materials with superior properties and find their application value.The rare earth ion Er^(3+),Eu^(3+)co-doped LaOF phosphors were prepared by the hydrothermal-assisted solid-phase method.The phase composition,particle size,morphology and fluorescence spectrum of LaOF∶Eu^(3+)phosphors doped with Er^(3+)at different concentrations were characterized and analyzed by X-ray diffractometer(XRD),scanning electron microscope(SEM)and fluorescence analyzer.The results show that the precursor LaF3 of phosphors is well transformed into tetragonal LaOF after calcining at 900℃,and with the increase of Er^(3+)doped concentration,the luminescent properties of the phosphors show a good rule at the excitation wavelengths of 365 nm and 393 nm.Among them,the excitation at 365 nm shows the transition from orange light to yellow light,while the excitation at 393 nm shows the transition from orange light to magenta light.Finally,Er^(3+),Eu^(3+)co-doped LaOF phosphor is made into ink and printed into patterns,and when it is excited at 365 nm and 395 nm,the orange and purple emission is visible,respectively,which shows that they can be used in the field of anti-counterfeiting.

关 键 词：Er^(3+) Eu^(3+) LaOF荧光粉 光学性能 防伪油墨 

分 类 号：O482.31[理学—固体物理]