Bluish-green color emitting Ba2Si3O8:Eu2+ ceramic phosphors for white light-emitting diodes

Spectrochim Acta A Mol Biomol Spectrosc. 2009 Oct 15;74(3):758-60. doi: 10.1016/j.saa.2009.08.011. Epub 2009 Aug 12.

Abstract

This paper reports on the structural and optical properties of Eu(2+) activated Ba(2)Si(3)O(8) ceramic phosphors synthesized by a sol-gel method. The ceramic phosphors have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and fluorescence measurements. The structural characterization results suggest that the as-prepared phosphors are of single phase monoclinic Ba(2)Si(3)O(8) with rod-like morphology. A broad excitation band ranging from 300 to 410 nm matches well with the ultraviolet (UV) radiation of light-emitting diodes (LEDs). Upon 380 nm UV light excitation, these phosphors emit bluish-green emission centered at 500 nm with color coordination (x=0.25, y=0.40). All the obtained results indicate that the Ba(2)Si(3)O(8):Eu(2+) ceramic phosphors are promising bluish-green candidates for the phosphor-converted white LEDs.

MeSH terms

  • Barium / chemistry*
  • Ceramics / chemistry*
  • Europium / chemistry*
  • Light
  • Luminescence
  • Molecular Structure
  • Phase Transition
  • Phosphorus / chemistry*
  • Photochemistry
  • Silicates / chemistry*
  • X-Ray Diffraction

Substances

  • Silicates
  • Barium
  • Phosphorus
  • Europium