高性能有機半導体:硫黄を含む非対称な線形アセン
Ming L Tang1, Toshihiro Okamoto, Zhenan Bao
1Department of Chemistry, Stanford University, California 94305, USA.
Journal of the American Chemical Society
|December 15, 2006
まとめ
融合したチオフェン単位を持つ2つの新しい線形アセンが合成され,アントラセンとペンタセンの結合長さを橋渡しました. これらの有機半導体は,電子アプリケーションのための有望な電荷キャリアの移動性を示しています.
科学分野:
- 有機化学 オーガニック・ケミストリー
- 材料科学 材料科学とは
- 固体物理 固体物理学
背景:
- 線形アセンは重要な有機半導体である.
- 調節結合の長さは,電子特性に影響する.
- 溶融チオフェンユニットは,ユニークな電子特性を提供します.
研究 の 目的:
- 溶融したチオフェン単位で新しい線形アセンを合成する.
- 薄膜形態と成長を調査する.
- 潜在的なアプリケーションのために,それらの負荷輸送特性を評価します.
主な方法:
- 新しいアセンの誘導体の化学合成.
- 紫外線スペクトロスコピーとX線 difraktionを用いた薄膜の特徴化.
- 原子力顕微鏡 (AFM) による形態学的分析.
- フィールドエフェクトトランジスタ (FET) の測定を用いた電気性能評価.
主要な成果:
- アントラセンとペンタセンの結合による2つの新しい線形アセンの合成に成功しました.
- AFMはペンタセンのようなサブモノレイヤーの成長とデンドリティック薄膜形態を明らかにした.
- 高電荷キャリアの移動性が達成された:テトラセノ[2,3-b]チオフェンでは最大0.47cm2のV-1s-1,アンスラ[2,3-b]チオフェンでは最大0.15cm2のV-1s-1.
結論:
- 合成された線形アセンは有望な有機半導体材料である.
- 形態学は,これらの材料における電荷伝送を著しく影響する.
- これらの発見は,先進的な有機電子機器の開発に寄与します.
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