光発光した層状のランタニドシリケート.
Duarte Ananias1, Mariya Kostova, Filipe A Almeida Paz
1Contribution from the Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
Journal of the American Chemical Society
|August 19, 2004
まとめ
新しい層状のランタニドシリケート (AV-22材料) が合成され,特徴づけられました. これらの材料は調節可能な光発光を発しており,照明技術における光体として潜在的な応用がある.
科学分野:
- 材料科学 材料科学とは
- 無機化学 無機化学とは
- 固体化学 固体化学
背景:
- ランタニドシリケートは,興味深い光学特性を有する材料のクラスです.
- 調節可能な放出を持つ新しいフォスファーの開発は,先進的な照明アプリケーションにとって極めて重要です.
研究 の 目的:
- 水熱で合成し,構造的に特徴づけるために,新しい層状のランタニドシリケート,指定AV-22.2.
- 様々なランタニドイオンでドーピングされたこれらのAV-22材料の光発光性能を調査するために.
主な方法:
- 構造の解明のための単結晶および粉末X線 difraktion.
- 化学分析,熱重力測定,SEM, (29) Si MAS NMR,および光発光スペクトロスコピーによる特徴付け.
- 水熱合成技術. 水熱合成技術.
主要な成果:
- K ((3)) [M ((1-a) Ln ((a) Si ((3) O ((8) ((OH)) ((2)) ] (AV-22) 材料の合成に成功しました.
- Er-AV-22は室温の赤外線フォスファーとして機能します.
- Tb-とEu-AV-22は,商用規格に匹敵する効率で,可視的な放射を放出しています.
- 調節可能な光発光は,複数のランタニドイオンを組み込むことで達成される.
- 混合ドーピングされた材料におけるTb(3+) -to-Eu(3+) エネルギー伝達の証拠.
結論:
- 層層のAV-22構造は,精密調整された発光のために複数のランタニドイオンを組み込むことを容易にする.
- これらの材料は,照明およびディスプレイ技術におけるアプリケーションの有望性を示しています.
- コドーピングされたAV-22材料では,効率的なエネルギー転送メカニズムが観察されました.
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