電子欠乏ポリマーのコプラナー・バックボーン構成を水素結合で操作することによって,単極型n型トランジスタの性能を大幅に改善
Yang Wang1, Tsukasa Hasegawa1, Hidetoshi Matsumoto1
1Department of Materials Science and Engineering , Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552 , Japan.
Journal of the American Chemical Society
|February 1, 2019
まとめ
高性能のn型半導体ポリマーは,有機電子機器にとって極めて重要です. この研究では,最適化された骨格構造と水素結合によって達成された,最大7.16cm2Vs-1の電子移動性を有する新しいポリマーが報告されています.
科学分野:
- 材料科学
- オーガニック電子
- ポリマー化学
背景:
- 高性能の単極 n型半導体ポリマーの開発は,有機電子学の重要な課題です.
- 既存の材料はしばしば高い電子の移動性を達成するために苦労し,その応用を制限します.
- 5cm2V-1s-1を超える単極電子移動 (μe) はまれである.
研究 の 目的:
- 単極電子の移動性を強化した新しいポリ ((ベンゾチアディアゾール-ナフタレンジミド) 誘導体を開発する.
- 背骨の形状と水素結合が電荷輸送特性に与える影響を調査する.
- 半導体ポリマーの電子移動性を改善するための一般的な戦略を確立する.
主な方法:
- ヴィニレンブリッジを組み込んだ新しいポリ (ベンゾチアジアゾール-ナフタレンジミド) 誘導体の合成
- 背骨の形状とπシステムの平面性を予測および分析するための密度関数理論 (DFT) の計算.
- 電子の移動性を測定するための薄膜トランジスタ (TFT) の製造と特徴付け.
- シンクロトロンX線散射 (GIWAXS) と原子力顕微鏡 (AFM) で,薄膜結晶性と分子パッキングを研究する.
主要な成果:
- TFTで高単極電子移動 (μe) を7.16cm2V-1s-1まで達成した.
- ヴィニレンブリッジは分子内水素結合を誘導し,より平らな骨格構造を促進しました.
- GIWAXSとAFMによって証明された,強化された平面性は,薄膜結晶性と分子包装の改善につながった.
- GIWAXSは3.40 Åの例外的に短いπ-πスタッキング距離を明らかにした.
結論:
- この研究は,単極性n型半導体ポリマーの重要な進歩を示しています.
- 水素結合によるバックボーンコプラナリティの最適化は,電子の移動性を高めるための効果的な戦略です.
- この発見は,高性能の有機電子材料を設計するための有望なアプローチを提供します.
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