マッチングドーパントによる高および主としてノンイオン伝導性のためのポリ ((bisdodecylquaterthiophene) 構造の修正
Hui Li1, Mallory E DeCoster2, Robert M Ireland1
1Department of Materials Science and Engineering, Johns Hopkins University , 3400 North Charles Street, Baltimore, Maryland 21218, United States.
Journal of the American Chemical Society
|July 25, 2017
まとめ
新しいp型ポリマーは,ポリ ((bisdodecylquaterthiophene) を基に,高い伝導性と安定性を達成する. 改変は酸化性を高め,電子用フィルムにノンイオン伝導性を記録する.
科学分野:
- 材料科学
- オーガニック電子
- ポリマー化学
背景:
- ポリー ((pQT12) は,有機電子のための塩基ポリマーである.
- 性能の向上には,p型ポリマーの酸化性の向上が不可欠です.
- 既存の伝導性ポリマーはしばしば不安定で,外部のイオン供給に依存しています.
研究 の 目的:
- 導電性と安定性の高い新しいp型ポリマーを合成し,特徴づけること.
- 特定の化学変化がポリマーの性質に及ぼす影響を調査する.
- 電子アプリケーションにおけるこれらの新しい材料の可能性を評価する.
主な方法:
- 改造された4つのポリドキルチオフェン (PQT12) ポリマーの合成.
- 硫黄原子および/または3,4-エチレン二酸化基をPQT12構造に組み込む.
- NOBF4とテトラフローロテトラシアノキノディメタン (F4TCNQ) を用いたポリマーのドーピングと伝導性の測定
- 安定性,電荷移転,π-π スタッキング,分子間結合,シーベック係数,功率因数,熱伝導性の特徴
主要な成果:
- PQTS12 (硫黄改変) は,ドーピングされたポリマー溶液で報告された最も高い非イオン伝導率である350 S cm−1を達成した.
- PDTDE12 (エチレンダイオキシ変異) は, 140 S cm−1 の伝導性を示した.
- 導電性は空気中では安定しており,安定性および外部イオン供給の欠如の点でPEDOT:PSSを上回る.
- 効率的な電荷伝送,より緊密な π-π スタッキング,および強力な分子間結合が,高伝導性の重要な要因として特定されました.
- フィールドエフェクトトランジスタの研究によって支持された1-5cm2V−1s−1の移動性の増加が観察された.
- 導電性ポリマー (0.2-0.5 W m−1 K−1) には典型的であった.
結論:
- 合成されたp型ポリマーは優れた伝導性と空気安定性を示す.
- 化学的な改変により,ポリマーの酸化性と電子特性が大幅に向上します.
- これらの材料は,高度な有機電子機器に期待されていて, 移動性を向上させることでさらに改善される可能性があります.
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