Synthesis of Red-emitting Phosphors Based on Gadolinium Oxysulfate by a Flux Method

• KIM Sun-woog

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• MASUI Toshiyuki

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• IMANAKA Nobuhito

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

Abstract

Red-emitting phosphors based on gadolinium oxysulfate were synthesized in a single phase form by our original flux method using alkaline metal sulfate such as Na₂SO₄ and the 0.6Li₂SO₄--0.4Na₂SO₄ eutectic mixture, and photoluminescence properties were characterized. Addition of the flux is significantly effective to enhance the emission intensity, and the luminescent peak intensity of Gd₂O₂SO₄: 10%Eu³⁺ increased double and triples by using Na₂SO₄ and 0.6Li₂SO₄--0.4Na₂SO₄, respectively. The application of the 0.6Li₂SO₄--0.4Na₂SO₄ eutectic mixture works more effectively because the melting point (600°C) is significantly lower than that of Na₂SO₄ (887°C).

Journal

• Electrochemistry

  Electrochemistry 77 (8), 611-613, 2009

  The Electrochemical Society of Japan

Keywords

• Rare Earth Oxysulfate
• Phosphor
• Flux Method
• Eutectic Mixture
• Molten Salt

Details

• CRID: 1390282681474222720
• NII Article ID: 130002150611
• DOI: 10.5796/electrochemistry.77.611
• COI: 1:CAS:528:DC%2BD1MXhtVShsr7L
• ISSN: 21862451
• ISSN: 13443542
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/77/8/77_8_611/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Allowed