溶性La@C82誘導体の半金属単一構成結晶で,電子の移動性が高い
Satoru Sato1, Shu Seki, Yoshihito Honsho
1Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki, Japan.
Journal of the American Chemical Society
|February 8, 2011
まとめ
研究者らは,10cm(2) V(-1) s(-1) を超える,非常に高い電子移動性を有する新しい有機導体結晶を開発しました. オーガニック・エレクトロニクスにおけるこの画期的な進歩は,オーダーされたLa@C(82) Ad結晶構造を用いて達成された.
科学分野:
- 材料科学 材料科学とは
- オーガニック・エレクトロニクス
- 固体物理 固体物理学
背景:
- C82フルレン (La@C(82) にカプセル化されたランタンなどの内向フルレンは,n型半導体として知られています.
- 有機導管は,柔軟で低コストの電子機器の可能性を秘めています.
- 有機物質の高い電子移動性を達成することは,依然として大きな課題です.
研究 の 目的:
- 電子の移動性が向上した新しい有機導体結晶を合成し,特徴づけること.
- オーダーされたアダマンチリデネ (Ad) 誘導体であるLa@Cの電子特性を調査する82).
- 高性能有機電子機器のための単一成分分子結晶の潜在能力を探求する.
主な方法:
- アダマンチリデネ (Ad) 誘導体のLa@C(82) を用いて単一成分有機導体結晶を製造する.
- フレッシュフォトリシスによる時間解像度マイクロ波伝導率 (TRMC) を使って,環境条件下で電子の移動性を測定する.
- 電子帯域構造を決定するための密度関数理論 (DFT) 計算.
主要な成果:
- シングルコンポーネントのLa@C(82) Ad結晶は,c軸に沿って10cm(2) V(-1) s(-1) 以上の電子の移動性を示した.
- この流動性は,TRMCで測定された有機導体の中で最も高い値です.
- DFTの計算は,0.005 eVの狭いバンドギャップを持つ半金属的な性質を明らかにしました.
結論:
- オーダーされたLa@C(82) Ad結晶は,有機導体性能の重要な進歩を表しています.
- 単一成分有機結晶における高い電子移動性は,環境条件下では達成可能である.
- この材料は,次世代の有機電子アプリケーションに期待を寄せている.
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