基于油酸辅助水热法制备NaLuF_4∶Ln^(3+)及光谱性质  

Synthesis and Spectral Properties of NaLuF_4∶Ln^(3+) Based on Oleic Acid Assisted Hydrothermal Method

作　　者：邸克书 姜浩[1] 闫景辉[1] 姚爽[1] 康振辉[2] 

机构地区：[1]长春理工大学化学与环境工程学院,长春130022 [2]苏州大学功能纳米与软物质(材料)研究院,苏州215123

出　　处：《无机化学学报》2016年第10期1723-1729,共7页Chinese Journal of Inorganic Chemistry

基　　金：吉林省科技攻关计划重大科技招标专项(No.20150203013YY);吉林省科技发展项目(No.20130522126JH);国家重点基础研究发展计划(973计划)项目(No.2012CB82580);国家自然科学基金重点项目(No.51132006);国家自然科学基金青年基金(No.21301020)资助

摘　　要：采用油酸辅助水热法合成了具有上下转换发光性能的NaLuF_4∶Ce^(3+)、NaLuF_4∶Ce^(3+),Tb^(3+)、NaLuF_4∶Yb^(3+),Tm^(3+)、NaLuF_4∶Yb^(3+),Er^(3+)以及NaLuF_4∶Yb^(3+),Er^(3+),Tm^(3+)荧光粉材料。X射线衍射(XRD)表征结果表明产物各个衍射峰与标准卡片PDF#27-0726较好的吻合,得到六方相NaLuF_4晶体。扫描电镜(SEM)显示产物形貌为六棱柱,由粒径分布图可知属于微米级材料。NaLuF_4基质中单掺Ce^(3+)时,研究掺杂浓度对样品发光性能的影响表明NaLuF_4∶0.09Ce^(3+)的发光强度最大。双掺Ce^(3+)、Tb^(3+)时,详细讨论了NaLuF_4基质中Ce^(3+)→Tb^(3+)的能量传递机制,可认为是偶极-四极作用。在980 nm激光激发下,增大Yb^(3+)的掺杂浓度可以使Er^(3+)的红(~4F_(9/2)→~4I_(15/2))/绿(~2H_(11/2)→~4I_(15/2),~4S_(3/2)→~4I_(15/2))光发射比例增大,Er^(3+)的红光和绿光发射过程均属于双光子发射,Tm^(3+)的蓝光发射过程属于三光子发射,并且NaLuF_4∶0.20Yb^(3+),0.005Er^(3+),0.005Tm^(3+)样品实现了白光发射(x=0.335,y=0.385)。NaLuF4：Ce3, NaLuF4：Ce3, Tb3, NaLuF4：Yb3, Tm3, NaLuF4：Yb3, Er3 and NaLuF4：Yb3, Er3, Tm3 up-down conversion fluorescent materials were synthesized by the oleic acid assisted hydrothermal method. The X-ray diffraction （XRD） characterizations showed that each of the diffraction peak of as-prepared samples was in agreement with the PDF#27-0726, and NaLuF4 with hexagonal unit cell was obtained. SEM images showed that the products morphologies were hexagonal prism, and the grain size distribution showed the products belonged to micron materials. The influence of doping concentration on luminescence properties of the samples showed the luminescence intensity of the NaLuF4：0.09Ce3 sample achieved maximum when single-doped Ce3 in NaLuF4 matrix. The energy transfer mechanism of Ce3→Tb3 was dipole-quadrupole interaction after discussed in detail. As Yb3 doped content increased, the proportion of the emission of the red/green of Er3 increased with excited by a 980 nm laser. The red and green emissions of Er3 belong to the two-photon emission process, and the blue emission of Tm3 belongs to the three-photon emission. The white emission （x=0.335, y=0.385） was achieved in the NaLuF4：0.20Yb3, 0.005Er3, 0.005Tm3 sample.

关 键 词：油酸 四氟镥钠 能量传递 白光发射 

分 类 号：O611.4[理学—无机化学] O614.33[理学—化学]