高度安定した赤色発光電気化学電池
Cathrin D Ertl1, Cristina Momblona2, Antonio Pertegás2
1Department of Chemistry, University of Basel , Spitalstrasse 51, CH-4056 Basel, Switzerland.
Journal of the American Chemical Society
|February 4, 2017
まとめ
新しいイリジウム (III) 複合体は,非常に安定した発光電気化学電池 (LEC) のための効率的な赤色放射を示します. リガンドの改変により性能が向上し,一部の装置は6000時間以上稼働する.
科学分野:
- 協調化学
- 材料科学
- オーガニック電子
背景:
- サイクロメタル化イリジウム (III) 複合体は,効率的な有機発光装置の開発において極めて重要です.
- リガンド構造の調節は,光物理的性質とデバイスの安定性を最適化するための鍵です.
- 光を発する電気化学セル (LEC) は,シンプルなデバイスのアーキテクチャにより,従来のOLEDに有望な代替品を提供します.
研究 の 目的:
- 合わせたリガンドを用いた新しいサイクロメタル化イリジウム (III) 複合体を合成し,特徴づけること.
- LECにおける赤色放射体としてのこれらの複合体の構造-特性関係を調査する.
- リガンドの改変が光発光とデバイスの性能,特に安定性に与える影響を評価する.
主な方法:
- 新しいサイクロメタル化イリジウム (III) コンプレックスの一連の合成, [Ir(ppy) 2[NN]][PF6と表記される.
- 選択された複合体に対する単結晶X線微分を用いた構造的特徴化.
- これらの複合体を活性層で利用した光発光電気化学セル (LEC) の製造と試験.
主要な成果:
- 7つの新しいイリジウム (III) 複合体の合成と特徴付けに成功した.
- 合成された複合体から効率的な赤色放射が示された.
- 特定の複合体では1000時間,4000時間,6000時間を超えた非常に安定した赤色発光LECを達成した ([Ir(ppy) 2[L1][PF6],[Ir(ppy) 2[L3][PF6,および[Ir(ppy) 2[L2][PF6).
結論:
- 合成されたサイクロメタル化イリジウム (III) 複合体は,LECの適用のための効果的な赤色エミーターである.
- リガンドの設計は,その結果LECの光発光と動作安定性に大きく影響する.
- 開発された複合体は 次世代の 長期にわたる 赤い放射性電気化学装置の道を開きます
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