配合されたポリマーナノファイバーの長距離エクシトン輸送

Xu-Hui Jin¹, Michael B Price², John R Finnegan¹

¹School of Chemistry, University of Bristol, Bristol BS8 1TS, UK.

Science (New York, N.Y.)

|May 26, 2018

まとめ

研究者は有機半導体ナノファイバーを効率的な光収集装置に開発しましたこれらの材料は,高度な光電子機器にとって不可欠な長距離エクシトン輸送を可能にします.

科学分野:

材料科学
オーガニック電子
ナノテクノロジー

背景:

遠距離でのエクシトンの輸送は,光電子装置にとって非常に重要です.
オーガニック半導体は光を集めるアプリケーションの可能性を秘めているが,しばしばエクシトンの流動性には限界がある.

研究の目的:

オーガニック半導体ナノファイバーをエンジニアリングしエクシトン輸送特性を向上させる
新しいナノファイバー構造におけるエクシトン拡散のメカニズムと効率を調査する.

主な方法:

ポリエチレングリコールとポリチオフェンのコアとセグメンテッドコロナを使用したコアシェルナノファイバーの製造.
ナノファイバーの構造と形態の特徴
振動子拡散長と係数を光譜法で測定する.

主要な成果:

有機半導体ナノファイバーを結晶型ポリ (di-n-hexylfluorene) コアとポリチオフェン末端のコロナで成功して合成した.
コアからポリチオフェンコロナへエクシトンの効率的な転送が実証された.
異常に長いエキシトンの拡散長さは200ナノメートルを超え,0. 5cm2/sの高い拡散係数を得ました.

結論:

ナノファイバーの結晶の核は均一なエネルギー環境を作り出し効率的なエクシトン輸送を可能にします
これらの工学的なナノファイバーは高性能の光収集および光電子機器のための有望な材料です
この研究は,有機半導体におけるエクシトン輸送の制限を克服するためのナノ構造工学の可能性を強調しています.

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