単結晶有機薄膜トランジスタにおけるクーロンブ阻害輸送
1Department of Applied Physics, and Materials Science Center, University of Groningen, The Netherlands. alex.schoonveld@philips.com
Nature
|May 9, 2000
まとめ
電子の相互作用が回路の流れをブロックするクーロンブロック輸送は,有機薄膜トランジスタの室温で観察されます. これは,分子部位の小ささによるもので,充電エネルギーを高めます.
科学分野:
- 凝縮物質物理学 凝縮物質物理学
- マテリアルサイエンス 材料科学
- オーガニック・エレクトロニクス
背景:
- クーロンブ封鎖輸送には,大きなトンネル抵抗と充電エネルギーが必要です.
- 金属の島における以前の観測では,大きな容量のため,非常に低い温度が必要でした.
- 有機薄膜トランジスタ (OTFT) は,室温クーロンブ阻害の可能性を秘めている.
研究 の 目的:
- 有機薄膜トランジスタにおけるクーロンブ阻害輸送を調査する.
- 分子配列における室温クーロンブロックを実証する.
- エネルギーと輸送の充電に分子サイズが与える影響を調査する.
主な方法:
- 高度に秩序付けられた分子材料を用いたOTFTの製造.
- ゲートバイアスと気温の関数として導電性測定.
- クーロンブ封鎖モデルの枠組みにおける輸送特性の分析.
主要な成果:
- 有機薄膜トランジスタは,室温でクーロンブ阻害輸送を示す.
- サブナノメートルの分子部位は,熱エネルギー (kT) を支配する重要な充電エネルギーにつながります.
- クーロンブ封鎖モデルと一致する熱的に活性化された輸送が観察されました.
結論:
- OTFTにおける高度に秩序付けられた分子材料は,クーロンブブロックのサイトの配列として機能することができます.
- 分子部位の小さな容量は,室温クーロンブブロックを可能にし,以前のシステムの限界を克服します.
- この研究は,分子クーロンブブロック現象に基づく新しい電子機器の道を開く.
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