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Luminescence and energy transfer of Mn2+ co-doped SrSi2O2N2:Eu2+ green-emitting phosphors
- Source :
-
Materials Science & Engineering: B . Aug2009, Vol. 164 Issue 1, p12-15. 4p. - Publication Year :
- 2009
-
Abstract
- Abstract: Eu2+ and Mn2+ co-doped SrSi2O2N2 green-phosphors, with promising luminescent properties (examined by their powder diffuse reflection, photoluminescence excitation and emission spectra) suitable for UV converted white LEDs, were produced by high temperature solid-state reaction method. The produced materials exhibited intense broad absorption bands at 220â500nm and a broad emission band centered at ca. 530nm, attributed to 4fâ5d transitions of Eu2+. The emission intensity of Eu2+ ions was greatly enhanced by introducing Mn2+ ions into SrSi2O2N2:Eu2+ due to the energy transfer from Mn2+ to Eu2+. The energy transfer probability from Mn2+ to Eu2+ depends strongly on the Mn2+ concentration, which is maximized at a Mn2+ concentration of 3mol%. It drastically decreases for higher concentrations. The results indicated that SrSi2O2N2:Eu2+, Mn2+ is a promising green-emitting phosphor for white-light emitting diodes with near-UV LED chips. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09215107
- Volume :
- 164
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: B
- Publication Type :
- Academic Journal
- Accession number :
- 43527553
- Full Text :
- https://doi.org/10.1016/j.mseb.2009.06.005