高効率の緑色有機発光ダイオードには,発光性三座標銅 ((I) 複合体を含む
Masashi Hashimoto1, Satoshi Igawa, Masataka Yashima
1Luminescent Materials Laboratory, RIKEN (The Institute of Physical & Chemical Research), Hirosawa 2-1, Wako-Shi 351-0198, Japan.
Journal of the American Chemical Society
|May 20, 2011
まとめ
新しい銅 ((I) 複合体は,有機発光ダイオード (OLED) のための高光発光性を示す. これらの材料は,原型OLEDデバイスで効率的で明るい緑色の光放出の可能性を示しています.
科学分野:
- マテリアルサイエンス 材料科学
- 有機化学 オーガニック・ケミストリー
- フォトフィジックスの光学
背景:
- 有機発光ダイオード (OLED) は,現代的なディスプレイと照明技術にとって極めて重要です.
- 高効率と安定性を有する新種の放射性物質の開発は,現在進行中の研究分野です.
- 三座標銅 ((I) 複合体は,従来の光発射器の費用対効果の高い代替品として潜在的な可能性を秘めています.
研究 の 目的:
- 特定のフォスフィンリガンドを持つ新しい3座標銅 (((I)) 複合体を合成し,特徴づけること.
- 溶液および固体状態におけるこれらの複合体の光発光特性について調査する.
- プロトタイプOLEDデバイスにおける放出物質としてのこれらの複合体の性能を評価する.
主な方法:
- 3つの座標を持つ銅 ((I) 複合体の合成: (dtpb) Cu ((I) X,ここで X = Cl (1), Br (2), I (3) と dtpb = 1,2-bis ((o-ディトリルフォスフィノ) ベンゼン.
- 脱ガスされたジクロロメタン溶液と無形フィルムにおける光発光測定により,量子収量 (Φ) と寿命 (τ) を決定した.
- 放射層に合成された銅 (((I)) 複合体を組み込んだ従来のOLEDデバイスの製造と試験.
主要な成果:
- 合成された銅 (I) 複合体 (1-3) は,優れた光発光性能を示した.
- 高量子収量 (Φ = 0.43-0.60溶液, Φ = 0.57-0.71フィルム) と適切な寿命 (τ = 4.9-6.5μs溶液, τ = 3.2-6.1μsフィルム) が観察されました.
- 複合体2を使用したOLEDは,電流効率65.3cd/A,最大外部量子効率21.3%の明るい緑色発光を実現しました.
結論:
- 合成された三座標銅 (((I) 複合体は,高排出物質である.
- これらの複合体は,効率的な有機発光ダイオードへの応用が非常に有望であることを示しています.
- 結果は,先進的な光電子機器のための実行可能なエミッターとして銅 (I) 複合体の可能性を強調しています.
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