高溶性 [1]ベンゾチエノ[3,2-b]ベンゾチオフェン (BTBT) 誘導体は,高性能で溶液加工された有機フィールド効果トランジスタに使用されます
Hideaki Ebata1, Takafumi Izawa, Eigo Miyazaki
1Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
Journal of the American Chemical Society
|November 30, 2007
まとめ
溶液処理可能な分子半導体である2,7-ダイアルキル[1]ベンゾチエノ[3,2-b]ベンゾチオフェンは,有機フィールド効果トランジスタ (OFET) で優れた性能を示しています. これらの材料は,電子アプリケーションのための高電荷キャリアの移動性と安定性を示しています.
科学分野:
- 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
- 半導体物理学 半導体物理学
背景:
- 有機半導体は,柔軟で低コストの電子機器の開発に不可欠です.
- 溶液処理可能な材料は,有機電子機器のスケーラブルな製造に非常に望ましい.
研究 の 目的:
- 2,7-ダイアルキル[1]ベンゾチエノ[3,2-b]ベンゾチオフェンの高性能,溶液処理可能な分子半導体としての可能性を調査する.
- これらの化合物から製造された薄膜の構造的および電子的性質を評価する.
主な方法:
- 2,7-ダイアルキル[1]ベンゾチエノ[3,2-b]ベンゾチオフェン誘導体の合成と特徴付け.
- Si/SiO2基板にスピンコーティングを積んだ有機フィールド効果トランジスタ (OFET) の製造.
- X線微分法 (XRD) を用いた構造分析.
- 環境条件下での電気性能評価.
主要な成果:
- スピンコーティングされた薄膜は,XRD分析によって確認された,順番の良い構造を示した.
- オーガニック半導体は,典型的なpチャネルフィールド効果トランジスタ (FET) 特性を示した.
- フィールド・エフェクト・モビリティは1.0cm2 V-1s-1.0を超えました.
- 約107の高いオン/オフ電流比 (イオン/オフ) が達成されました.
結論:
- 2,7-ダイアルキル[1]ベンゾチエノ[3,2-b]ベンゾチオフェンは,溶液処理可能な有望な分子半導体である.
- 材料は,優れた充電輸送特性を持つ高性能OFETの製造を可能にします.
- これらの発見は,これらの化合物の高度な有機電子アプリケーションでの使用を支持します.
関連する概念動画
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
Reactions at the Benzylic Position: Halogenation
Benzylic halogenation takes place under conditions that favor radical reactions such as heat, light, or a free radical initiator like peroxide.
Field Effect Transistor
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
Electrophilic Aromatic Substitution: Sulfonation of Benzene
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
Directing and Steric Effects in Disubstituted Benzene Derivatives
When disubstituted benzenes undergo electrophilic substitution, the product distribution depends on the directing effect of both substituents. When the directing effects of both substituents reinforce each other, a single product is obtained. For example, bromination of p-nitrotoluene occurs ortho to the methyl group and meta to the nitro group, which is the same position, resulting in a single product. However, if the directing effects of the two groups oppose each other, the more strongly...
Bipolar Junction Transistor
Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
The structure...


