Eu2+ 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

解 栄軍; 広崎 尚登; 山本 吉信; 末廣 隆之; 三友 護; 佐久間 健

doi:10.2109/jcersj.113.462

Papers

Fluorescence of Eu²⁺ in Strontium Oxonitridoaluminosilicates (SiAlONS)

Rong-Jun XIE, Naoto HIROSAKI, Yoshinobu YAMAMOTO, Takayuki SUEHIRO, Mamoru MITOMO, Ken SAKUMA

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Keywords: Oxonitridoaluminosilicates, Rare earth, Fluorescence, Phosphor, Concentration quenching, Chromaticity coordination

JOURNAL FREE ACCESS

2005 Volume 113 Issue 1319 Pages 462-465

DOI https://doi.org/10.2109/jcersj.113.462

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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.

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