Synthesis and Characterization of Eu2 +/Ce3 + Doped Ca3Si2O4N2 Phosphors
Eu2+/Ce3+ doped Ca3Si2O4N2 phosphors have been successfully synthesized at 1450 °C via a solid-state reaction method under a nitrogen atmosphere. Their photoluminescence (PL) properties exhibit the main emission peaks at 506 nm and 420 nm for Eu2+/Ce3+ doped Ca3Si2O4N2 respectively, which can be excited in the range from 280 nm to 380 nm, indicating them the attractive candidate phosphors as near ultraviolet (UV) phosphor-converted light-emitting diodes (pc-LEDs). Moreover, it is found that the luminescence property is doping-concentration dependent, and the energy transfer results in a red-shift with increasing Eu2+/Ce3+ concentration. The quenching concentrations of Eu2+ and Ce3+ are approximately 7 at.% and 5 at.%, respectively.
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Document Type: Short Communication
Publication date: July 1, 2014
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