NaYF_4:Er^(3+)六棱柱的水热合成及上转换发光性能  

Hydrothermal synthesis and up-conversion luminescent properties of NaYF_4: Er^(3+) hexagonal prism

作　　者：陈喜蓉[1] 陈早明[2] 胡德远[1] 刘和春[1] 吴叔召[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,赣州341000 [2]江西理工大学工程研究院,赣州341000

出　　处：《化工新型材料》2012年第4期112-114,共3页New Chemical Materials

基　　金：江西省教育厅科研项目(gjj11122);江西理工大学博士启动基金资助(02939)项目

摘　　要：以氟化钠、硝酸钇、硝酸铒为原料,利用水热法合成NaYF4:Er3+材料。利用X射线粉末衍射仪(XRD)、场扫描电子显微镜(SEM)、红外吸收(FT-IR)以及发光光谱等手段对产物的物相结构、形貌和荧光性能进行分析。结果表明,NaYF4:Er3+为六角棱柱晶体,属于六方晶系,具有P63/m(176)空间点群结构。在980nm光激发下,NaYF4:Er3+展现出强的上转换光,波长在520nm和539nm为绿光发射,对应为Er3+离子的2 H11/2→4/I15/2和4S3/2→4/I15/2跃迁发射,而652nm为红光发射,则对应于Er3+离子的4F9/2→4/I15/2跃迁发射。NaYF4：Er3＋ luminescent materials were synthesized by hydrothermal method using sodium fluoride,yttrium nitrate,erbium nitrate as raw materials.The obtained samples were characterized by X-ray powder diffraction（XRD）,scanning electron microscopy（SEM）,Fourier transform infrared（FT-IR） spectra and luminescence spectrum.The resulting of NaYF4：Er3＋ materials are mainly hexagonal crystal system with P63/m（176）points of space.The size of NaYF4：Er3＋ hexagonal prism is about 238×2000nm（side length × thickness）.The FT-IR spectra proves the presence of EDTA at the surface of the hexagonal prism.Under continuous-wave excitation of 980nm laser,the NaYF4：Er3＋ samples exhibit strong up conversion light.The green emission（from Er3＋,at 520 nm and at 539 nm）,the red emission from Er3＋at 652nm indicative of the great potential for the NaYF4：Er3＋ samples to be used on solar cell.

关 键 词：NaYF4:Er3+ 上转换发光 水热合成 

分 类 号：O611.4[理学—无机化学]