オーガニック・エレクトロニクス. OLEDの電流と核スピンの間での室温結合

H Malissa¹, M Kavand², D P Waters²

¹Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA. hmalissa@physics.utah.edu john.lupton@ur.de boehme@physics.utah.edu.

Science (New York, N.Y.)

|September 20, 2014

まとめ

研究者は,ダイオードのパルス核磁気共振を用いて,有機半導体におけるスピンカップリングを直接測定した. これにより,核スピン指向による電流の正確な制御が可能になります.

科学分野:

固体物理学固体物理学とは
オーガニック・エレクトロニクス
量子化学は量子化学である

背景:

外部磁場は,電荷载体と核スピンの超精密結合を通じて,有機半導体の伝導性を影響する.
このカップリングを理解することは,高度な電子機器のアプリケーションにとって非常に重要です.

研究の目的:

有機半導体における電荷载体と水素原子核の間の超微細結合を直接調査する.
核スピン指向を用いた電流の共振制御を実証する.

主な方法:

パルス式電気検出核磁気共振 (EDNMR) スペクトロスコピーの実施.
実験プラットフォームとして有機発光ダイオード (OLED) を利用.
ラジオ周波数パルスによる二重共振スキームを使用します.

主要な成果:

EDNMRは,スピン・エコー・エンベロープ・モジュレーションにおいて,同位体特有の指紋 (プロチウム対デウテリウム) を明らかにした.
核のスピン方向を操作することによって,電流の共鳴制御を達成した.
非常に低いエネルギースケールでの電流調節が実証された (10^-6倍の熱エネルギー).

結論:

有機半導体に対する磁場効果における超精密結合の役割を直接確認した.
核スピン操作による精密な電気電流制御の方法を確立した.
前例のないエネルギー効率を備えた新しいスピントロニックデバイスのための道が開かれました.

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