Dai, W. (2014) A Single-Phased Sr1-y-3x/2Al2Si2O8: xCe(3+), yMn(2+) with Efficient Energy Transfer as a Potential Phosphor for White-Light-Emitting Diodes. J. Am. Ceram. Soc. 97 2531–2538.
Added by: Laurent Cournède (2016-03-10 21:01:55)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0002-7820
Clé BibTeX: Dai2014
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Mots-clés: ba, ce3+, dy3+, emission, leds, luminescence properties, mn2+ phosphor, optical-properties, sr
Collection: J. Am. Ceram. Soc.
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A series of Ce3+-and Mn2+-(co-) activated SrAl2Si2O8 phosphors have been prepared at 1350 C under a reducing atmosphere and their photoluminescence properties have been studied as a function of the (co-) dopant ions concentrations. We have discovered that energy transfer (ET) not only from Ce3+ to Mn2+ but also from "defects" to Mn2+ by the facts that there is existing significant overlap between the emission spectrum of Ce3+ ("defects") and the excitation spectrum of Mn2+. The source of the "defects" in the host lattice is originated from the different charge substitution between Ce3+ and Sr2+. By adopting the principle of ET, the material SrAl2-Si2O8: Ce, Mn can act as a phosphor for white-light ultraviolet light-emitting diodes (UV-LEDs) by tuning of the dopants contents.
Added by: Laurent Cournède