Fluorescence of Eu2+ in Strontium Oxonitridoaluminosilicates (SiAlONS)

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  • XIE Rong-Jun
    Advanced Materials Lab., National Institute for Materials Science (NIMS)
  • HIROSAKI Naoto
    Advanced Materials Lab., National Institute for Materials Science (NIMS)
  • YAMAMOTO Yoshinobu
    Advanced Materials Lab., National Institute for Materials Science (NIMS)
  • SUEHIRO Takayuki
    Advanced Materials Lab., National Institute for Materials Science (NIMS)
  • MITOMO Mamoru
    Advanced Materials Lab., National Institute for Materials Science (NIMS)
  • SAKUMA Ken
    Optical Communication Technology Department, Fujikura Ltd.

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Other Title
  • Eu<sup>2+</sup> 付活ストロンチウム酸窒化アルミナケイ酸塩(サイアロン) の蛍光特性
  • Fluorescence of Eu〔2+〕 in Strontium Oxonitridoaluminosilicates (SiAlONS)

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Abstract

The fluorescence of two divalent europium-activated oxonitridoaluminosilicates, namely SrSi5AlO2N7 and SrSiAl2O3N2, is reported in this work. The powder sample was synthesized by sintering at 1800°C (SrSi5AlO2N7) or 1600°C (SrSiAl2O3N2) for 2 h under 0.5 MPa N2. A single broadband blue-green emission is observed for both SrSi5AlO2N7 : Eu2+ and SrSiAl2O3N2 : Eu2+ at room temperature under ultraviolet excitation. The short-wavelength fluorescence is attributed to the weak crystal-field strength as a result of long distances between the activator ion and ligand anions. The effect of the Eu2+ concentration on the emission intensity and CIE chromaticity coordinations of both samples is presented.<br>

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