Na_3ZrF_7:Er/Yb纳米颗粒的合成及荧光性能研究  

Synthesis and Photoluminescence of Na_3ZrF_7:Er/Yb Nanoparticles

作　　者：庾名槐[1,2] 王广盛 叶帅[1] 宋军[1] 屈军乐[1] 

机构地区：[1]深圳大学光电工程学院光电子器件与系统教育部/广东省重点实验室,深圳518060 [2]海南大学材料与化工学院,海口570228

出　　处：《人工晶体学报》2017年第9期1691-1696,共6页Journal of Synthetic Crystals

基　　金：深圳市科技计划项目(JCYJ20150324141711561);国家自然科学基金青年项目(61605124)

摘　　要：采用热分解法制备多种核壳结构的Na_3ZrF_7:Er/Yb纳米颗粒,并对制备的上转换纳米颗粒的形貌、晶相以及发光特性进行研究。在980 nm激发光激发下,与单核的Na_3ZrF_7:Er^(3+)2%,Yb^(3+)20%纳米颗粒相比,核壳结构的Na_3ZrF_7:Er^(3+)2%,Yb^(3+)20%@Ca F2上转换纳米颗粒荧光强度提高了5倍。把Yb^(3+)/Nd^(3+)共掺的四方相Na YF4层包覆在Na_3ZrF_7:Er^(3+)2%,Yb^(3+)20%@Ca F2纳米颗粒上,我们实现了Na_3ZrF_7@Ca F2@Na YF4纳米颗粒在808 nm激发下较强的上转换红光发射,发射光的红绿比在10左右,并对其发光机制作出了解释。In this paper,Na3ZrF7：Er/Yb nanoparticles（ NPs） with core-shell structures were prepared by pyrolytic process,the morphologies,phase and emission spectra of all samples were analyzed. The emission intensity of the Na3ZrF7：Er3 ＋2%,Yb3 ＋20% @ Ca F2 NPs was enhanced 5 times compared with that of Na3ZrF7：Er3 ＋2%,Yb3 ＋20% under excitation of 980 nm. By coating the tetragonal Yb/Nd codoped Na YF4 on Na3ZrF7：Er3 ＋2%,Yb3 ＋20% @ Ca F2 NPs,strongly upconverted red emissions of Na3ZrF7@ Ca F2@ Na YF4 NPs excited by an 808 nm laser were achieved,the red/green emission ratio approached a value of 10,the luminescence mechanism were elucidated.

关 键 词：上转换纳米颗粒 Na3ZrF7:Yb/Er 核壳结构 荧光强度 

分 类 号：TB383.1[一般工业技术—材料科学与工程]