Enhanced red light emission from LaBSiO5:Eu3+,R3+ (R=Bi or Sm) phosphors

Y N Xue; F Xiao; Q Y Zhang

doi:10.1016/j.saa.2010.11.030

Enhanced red light emission from LaBSiO5:Eu3+,R3+ (R=Bi or Sm) phosphors

Spectrochim Acta A Mol Biomol Spectrosc. 2011 Feb;78(2):607-11. doi: 10.1016/j.saa.2010.11.030. Epub 2010 Dec 4.

Authors

Y N Xue¹, F Xiao, Q Y Zhang

Affiliation

¹ MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.

PMID: 21212017
DOI: 10.1016/j.saa.2010.11.030

Abstract

Polycrystalline LaBSiO5:Eu3+,R3+ (R=Bi or Sm) phosphors have been synthesized by a facile sol-gel method. The phosphors have been characterized by thermogravimetric analysis/different scanning calorimeter, scanning electron microscopy, X-ray diffractometer and fluorescence measurements. It was found that the emission intensity of LaBSiO5:Eu phosphors increases clearly and reaches a maximum at 30 mol% with increasing of Eu3+ concentration. The incorporation of Bi3+ ions and/or Sm3+ ions have greatly enhanced the emission intensity of Eu3+ upon excitation with 391 nm light. The possible sensitization mechanisms of Sm3+ and/or Bi3+ on Eu3+ emission intensity have been investigated and discussed. The high brightness and short luminescence decay times make it promising red-emitting candidates for white light-emitting diodes.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bismuth / chemistry*
Calorimetry, Differential Scanning
Europium / chemistry*
Lanthanum / chemistry*
Luminescence*
Samarium / chemistry*
Spectrum Analysis
Thermodynamics
Thermogravimetry
X-Ray Diffraction

Substances

Samarium
Europium
Lanthanum
Bismuth