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Synthesis and luminescence properties of a broad-band red phosphor Ca3Si2O7:Eu2+ for warm white light-emitting diodes
- Source :
-
Journal of Luminescence . Jan2012, Vol. 132 Issue 1, p71-75. 5p. - Publication Year :
- 2012
-
Abstract
- Abstract: Single-phase broad-band red-emitting Ca3Si2O7:Eu2+ phosphors, with photoluminescence features that qualify them as candidates for white light-emitting diodes applications, were successfully synthesized via a modified solid-state reaction method that employed H3BO3 as a flux. The phosphors produced have an intense broad red emission band, with a peak at 603nm, a full width at half maximum of 110nm, and color coordinates of (0.550, 0.438). Concentration quenching occurred at 0.01mol Eu2+. The discussion of the results shows that Eu2+ ions should be accommodated at the Ca-sites of the lattice, dipole–dipole interactions should predominantly govern the energy transfer mechanism among them, and the critical distance between them is ∼31Å. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 132
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 66664678
- Full Text :
- https://doi.org/10.1016/j.jlumin.2011.07.009