有機薄膜トランジスタ用の小分子ポリマーブレンド半導体の構造と特性
Jihoon Kang1, Nayool Shin, Do Young Jang
1Department of Chemistry, Seoul National University, Seoul, 151-747, Korea.
Journal of the American Chemical Society
|August 30, 2008
まとめ
高分子量ポリアルファメチルステレン (PalphaMS) は TIPS-ペンタセンの半導体分離をインターフェイスで可能にし,有機薄膜トランジスタ (OTFT) の性能を向上させます. この最適化により,フィールドエフェクトのモビリティと,ソリューション処理デバイスのオン/オフ比が改善されます.
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
- ポリマーサイエンスの科学
背景:
- 溶液加工有機薄膜トランジスタ (OTFT) は,柔軟な電子機器にとって魅力的です.
- アクティブレイヤの最適化は,OTFTのパフォーマンスの向上に不可欠です.
- 6,13-bis ((triisopropylsilylethynyl) ペンタゼン (TIPS-ペンタゼン) は有望な有機半導体である.
研究 の 目的:
- TIPS-ペンタセン/ポリ・アルファ・メチル・スタイレン (PalphaMS) のブレンドフィルムを構造的および電気的に特徴付けるために.
- PalphaMSの分子質量の混合形態学と半導体配列に及ぼす影響を理解する.
- OTFTパフォーマンスを改善するために,ブレンドアクティブレイヤを最適化します.
主な方法:
- 鏡面ニュートロン反射性
- 牧草発生率のX線 difrractionによるX線 difrractionによるX線 difrractionによるX線 difrractionによるX線 difrractionによるX線 difrractionによる
- OTFTの電気特性について
主要な成果:
- 低分子量PalphaMS混合物は,空気界面でのみTIPS-pentacene分離を示しました.
- 高分子量PalphaMS混合物は,空気と基板の両方のインターフェイスで強いTIPS-pentacene分離を示しました.
- TIPS-pentaceneの高結晶性と望ましい方向性は,高分子量PalphaMSとの混合物で観察されました.
- TIPS-pentacene/PalphaMS混合の活性層は, TIPS-pentaceneに比べて優れた性能を示した.
結論:
- 高分子量PalphaMSは,ブレンドフィルムでTIPS-ペンタセンの構造をオーダーしたものを達成するための鍵です.
- 最適化されたブレンドアクティブレイヤは,モビリティとオン/オフ比率を含むOTFTパフォーマンスの向上につながります.
- これらの発見により,ソリューション処理可能な,高性能のボトムゲート/ボトムコンタクトのOTFTが可能になりました.
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