高電子親和度および高電子流動性を持つ四重B←N融合型ディベンゾアセーン
Yang Min1,2, Chuandong Dou1, Dan Liu3,2
1State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , P.R. China.
Journal of the American Chemical Society
|October 3, 2019
まとめ
研究者は高電子親和性と移動性を持つ新種のオルガノボロン化合物を開発した. これらの新しい材料は,四重B←N融合型ディベンゾアザエーセン (QBNA) で,先進的なn型有機半導体として有望である.
科学分野:
- オーガニックの電子機器
- 材料科学
- オーガノボロン化学
背景:
- オーガノボロン化合物は理論的には良い電子伝送物ですが,実用的な材料には限界があります.
- 既存のB含有分子には,しばしば最も低い空の分子軌道 (LUMO) のエネルギーレベル (> -4.0 eV) と低い電子移動性 (< 10−2 cm2/Vs) があります.
研究 の 目的:
- オーガノボロン化合物の高い電子親和性と移動性を実験的に実証する.
- 高性能なn型有機半導体のための新しい設計戦略を開発する.
主な方法:
- B←N融合型ディベンゾアザアセン (QBNA) を1ポット多重ボリレーションサイクルで合成した.
- アザアセンの構造に複数のボロン-窒素調整結合 (B←N) を組み込みました.
- 単結晶有機フィールド効果トランジスタ (OFET) を使用してQBNAを特徴付けました.
主要な成果:
- QBNAは, -4.58 eVのLUMOで, n型有機半導体の中で最も低い電子エネルギーレベルを示しています.
- QBNAの単結晶OFETは単極のn型行動を示した.
- 1.60cm2/Vsまでの高い電子移動性を達成し,優れた環境安定性があります.
結論:
- B←Nユニットの組み込みは,オルガノボロン化合物の電子親和性と移動性を高めるための効果的な戦略です.
- QBNAは,高性能なn型有機半導体の新しいクラスを表しています.
- この研究は,オルガノボロン化学に基づいた高度なπ結合システムを設計するための道を開きます.
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