应用化学 ›› 2015, Vol. 32 ›› Issue (4): 447-452.DOI: 10.11944/j.issn.1000-0518.2015.04.140242

• 研究论文 • 上一篇    下一篇

Li+,Eu3+共掺杂La2MoO6红色荧光粉的Pechini法合成及近紫外/蓝光激发下的发光特征

王梅芳, 周立群*, 李玲, 夏清华   

  1. 有机化工新材料湖北省协同创新中心,有机功能分子合成与应用教育部重点实验室,湖北大学化学化工学院 武汉 430062
  • 收稿日期:2014-07-14 出版日期:2015-04-10 发布日期:2015-04-10
  • 通讯作者: 周立群,教授; Tel/Fax:027-88663043; E-mail:zlq@hubu.edu.cn; 研究方向:固体无机
  • 基金资助:
     

Synthesis of Li+ and Eu3+ Co-doped La2MoO6 Red Phosphors by Pechini Methods and Its Photoluminescence Properties Under Near-Ultraviolet and Blue Light

WANG Meifang, ZHOU Liqun*, LI Ling, XIA Qinghua   

  1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials,Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China
  • Received:2014-07-14 Published:2015-04-10 Online:2015-04-10
  • Contact: Corresponding author:ZHOU Liqun, professor; Tel/Fax:027-88663043; E-mail:zlq@hubu.edu.cn; Research interests:inorganic solid state chemistry
  • Supported by:

    Supported by the National Natural Science Foundation of China (No.21301053), the Natural Science Fund for Creative Research Groups of Hubei Province of China(No.2014CFA015), the State College Students' Innovation Training Program of China (No; 201210512021)

摘要:

采用Pechini法合成了白光LED用红色荧光粉La1.9-xMoO6:0.10Eu3+,xLi+(x=0,0.10,0.20,0.25),并对样品分别进行了X射线衍射(XRD)、扫描电子显微镜(SEM)、电子能谱(EDX)以及荧光光谱(PL)等技术手段分析。 PL光谱显示该荧光粉可被近紫外光(395 nm)和蓝光(466 nm)有效激发,产生616和623 nm强的红光发射,归属于Eu3+5D07F2电偶极跃迁。该荧光粉与近紫外LED芯片(370~410 nm)和蓝光LED芯片(450~470 nm)均匹配良好,具有潜在的商业应用价值。 共掺Li+离子作为敏化剂能显著提高荧光粉的发光强度,且最优掺杂量为x=0.20。

 

关键词: Pechini法, La2MoO6: Eu3+, Li+敏化剂, 发光

Abstract:

A series of Li+ and Eu3+ co-doped red phosphors La1.9-xMoO6:0.10Eu3+,xLi+(x=0,0.10,0.20,0.25) has been successfully synthesized via Pechiini method. And the samples were investigated by the X-ray diffraction(XRD), scanning electron microscope(SEM), energy dispersive spectrometer(EDS) and photoluminescence(PL) measurements. The PL results reveal that the samples can be excited efficiently by near-ultraviolet(near-UV)(395 nm) and blue light(466 nm), and exhibit strong red emission peaks at 616 nm and 623 nm, due to the 5D07F2 electric dipole transition of Eu3+. These phosphors exhibit potential commercial value since they match well with white light emitting diode(W-LED) near-UV chip(370~410 nm) and blue light chip(450~470 nm). Addition of Li+ acting as a sensitizer strongly enhances the emission intensity of the phosphors, and the optimum concentration is x=0.20.

Key words: pechini method, La2MoO6: Eu3+, Li+ sensitizer, photoluminescence

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