PDF全文下载:2016030270
李国超, 戴洁, 吕蒙, 李霞*
(青岛科技大学 材料科学与工程学院,山东 青岛266042)
摘要: 通过均匀沉淀法制备了以二氧化硅为核,铕掺杂氧化钇为壳的分散性良好的SiO2@Y2O3:Eu3+核壳纳米粒子。扫描电镜(SEM)和透射电镜(TEM) 结果显示,纳米粒子具有明显的核壳结构。在236 nm激发光谱下,纳米粒子在613 nm显示出很强的红光发射峰,对应于铕离子的5D0→7F2能级跃迁。所得粒子由于具有强的光发射以及低电压电子束激发,在白色发光二极管、普通荧光灯、场发射显示器方面具有潜在的应用前景。
关键词: 核壳结构; 共沉淀; 发光性能
中图分类号:O 613.72文献标志码:A
Synthesis of SiO2@Y2O3:Eu3+ Core Shell Structured Particles and Its Luminescence Properties
LI Guochao, DAI Jie, LYU Meng, LI Xia
(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract:The monodisperse SiO2@Y2O3:Eu3+ coreshell particles were synthesized successfully by a simply homogeneous precipitation method. X ray diffraction (XRD), scanning electron microscopy (SEM), energydispersive X ray spectra (EDS), transmission electron microscopy (TEM), photoluminescence spectra (PL) characterize were used.The SEM and TEM results indicted that the Y2O3:Eu3+ phosphor was coated on SiO2 nanoparticles with a clearly coreshell structure. Under the excitation at 236 nm, the particles showed a strong red emission corresponding to the 5D0→7F2 transition of the Eu3+ ions at 613 nm. The asprepared particles have potential applications in white lightemitting diodes, general fluorescence lamps, field emission displays due to its strong light emission and lowvoltage electron beams excitation.
Key word:coreshell; precipitation; luminescence properties
收稿日期:20150317
基金项目: 国家自然科学基金项目(51372127,50102086, 50990303, 50872070).
作者简介: 李国超(1989—),男,硕士研究生.*通信联系人.
文章编号:16726987(2016)03027005; DOI: 10.16351/j.16726987.2016.03.007