Syntheses of Rare-Earth Silicon Oxynitrides and Their Luminescence Properties

• Kawana Michiya

• Itatani Kiyoshi

• Kojima Yoshiyuki

• Otten W. Martin

• Delsing Anne C. A.

• Hintzen Hubertus T.

• Koda Seiichiro

抄録

Synthesis conditions of melilite-type rare-earth silicon oxynitrides (RE2Si3O3N4; RE= La, Ce, Nd, Sm, Gd, Dy, Er and Yb) were examined using Si3N4 and rare-earth oxides as starting materials. The stoichiometric compounds could be synthesized by the solid-state reaction of equimolar RE2O3 (RE=Nd, Sm, Gd, Dy and Er) with Si3N4 at 1700°C for 2 h in N2 atmosphere. When near-ultraviolet light was irradiated to these compounds, only Gd2Si3O3N4 emitted yellow light without activator. The excitation and emission behaviors of Gd2Si3O3N4 were further examined by doping the activator (RE’3+; RE'= Ce, Sm, Tb, Dy and Er). Orange-colored light was emitted by doping S3+ to Gd2Si3O3N4; the relative emission intensity of Gd1.98Sm0.02Si3O3N4 achieved 1.8 (reference: Ca WO4). When Tb3+ was doped to Gd2Si3O3N4, the emission band of Gd2-2xTb2xSi30O3N4 was centered at 545 nm where the green-colored light was emitted; the maximum emission intensity achieved 3.5 (refernce:CaWO4) at x=0.06.

収録刊行物

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 32 (1), 119-122, 2007

  一般社団法人 日本MRS

キーワード

• Rare-earth silicon oxynitrides
• Solid-state reaction
• Phosphor
• Luminescence properties

詳細情報

• CRID: 1390004222631592320
• NII論文ID: 130007922736
• DOI: 10.14723/tmrsj.32.119
• ISSN: 21881650
• ISSN: 13823469
• Web Site: https://www.jstage.jst.go.jp/article/tmrsj/32/1/32_119/_pdf
• 本文言語コード: en
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