空心球形 Eu3+ 或 Tb3+ 掺杂 MgAl2O4 荧光粉的合成与发光

Synthesis and luminescence of hollow spherical Eu3+- or Tb3+ -doped MgAl2O4 phosphors.

作者信息

Wang Jinghui, Ye Junwei, Lin Yuan, Chen Wendan, Ning Guiling

机构信息

State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, Dalian 116012, PR China.

出版信息

J Nanosci Nanotechnol. 2010 Jan;10(1):574-8. doi: 10.1166/jnn.2010.1794.

DOI:10.1166/jnn.2010.1794

PMID:20352894

Abstract

Eu3+- or Tb3+ -doped MgAl2O4 hollow spheres have been successfully synthesized via facile hydrothermal method by using carbon spheres as template followed by a subsequent heat treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results showed that the hollow microspheres possessed diameters in the range of 1-2.5 microm and shell thickness of 60-80 nm. A possible formation mechanism for hollow spheres was proposed. MgAl2O4:Eu3+ show strong red emission at 619 nm corresponding to the forced electric dipole (5)D0-->(7)F2 transition of Eu3+, and MgAl2O4:Tb3+ exhibit strong green emission at 545 nm corresponding to 5D4-->(7)F5 transition of Tb3+.

摘要

通过以碳球为模板，采用简便的水热法并随后进行热处理，成功合成了掺杂Eu3+或Tb3+的MgAl2O4空心球。扫描电子显微镜（SEM）和透射电子显微镜（TEM）结果表明，空心微球的直径在1 - 2.5微米范围内，壳厚度为60 - 80纳米。提出了空心球可能的形成机制。MgAl2O4:Eu3+在619纳米处显示出强烈的红色发射，对应于Eu3+的强制电偶极（5）D0→（7）F2跃迁，而MgAl2O4:Tb3+在545纳米处表现出强烈的绿色发射，对应于Tb3+的5D4→（7）F5跃迁。