Fabrication of Eu-doped SrSi2O2N2 phosphor by a solid-state reaction using a new source of Si2N2O powder

Abstract

Si2N2O powder was synthesized by the direct reaction of silicon and silicon dioxide in an N2 atmosphere at 1450°C; the resulting Si2N2O powder was doped with Eu in a H 2/N2 atmosphere at 1350°C. The Eu-doped SrSi 2O2N2 powder showed a phosphorescence peak at approximately 530nm with an excitation wavelength of 450nm. Increasing the Eu content in the EuxSr1-x- Si2O 2N2 (x = 0-0.15) phosphor red-shifted the peak position. The Eu0.01Sr0.99Si2O2N2 phosphor showed high durability in water, and the emission intensity of the Eu0.01Sr0.99Si2O2N2 phosphor after soaking in water was 1.2 times higher than that of the phosphor before soaking in water. © 2014 The Ceramic Society of Japan. All rights reserved.