Applied Physics Letters · 2009 · 54 citations · 16 references
Natural SciencesChemistryMaterials ScienceCrystal StructureSemiconductor MaterialsSpectroscopyCrystal ChemistryFluorescence SpectroscopyLight-emitting DiodesLuminescent MaterialsPhosphorescence SpectroscopyRare-earth-doped MaterialsEmission Spectra AnalysisEnergy TransferPhosphor MaterialsPhosphorescent MaterialsPhosphorsPhotoluminescencePhotoluminescence SpectroscopyTime-resolved Photoluminescence Spectroscopy
Sr 2 Si 5 N 8 : Eu 2 + , one of the most recently developed phosphors for use in white light emitting diodes, exhibits a two-peak emission. Namely, the emission band of Sr2Si5N8:Eu2+ is deconvoluted into two Gaussian peaks irrespective of the Eu2+ concentration. We examined the two-peak emission of Sr2Si5N8:Eu2+ by analyzing the time-resolved photoluminescence spectra. We revealed that the two-peak emission was closely associated with the energy transfer taking place between Eu2+ activators located at two different crystallographic sites in the Sr2Si5N8 structure. The experimental results coincided well with the rate equation model involving the crystallographic information of the host.
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Rong‐Jun Xie, Naoto Hirosaki, Takayuki Suehiro et al. · Chemistry of Materials · 2006 · 610 citations
Natural Sciences, Materials Engineering, Materials Science +17