東京大学 · 材料科学
細川正夫教授の研究室は、有機半導体材料の分子設計とそのナノスケールでの自己組織化メカニズムに焦点を当てており、特にπ共有結合を有する有機分子からなる単一結晶薄膜の高効率な形成技術を開発しています。溶液プロセスを用いたウェーハスケールの均一な単分子層形成や、幾何的フラストレーションを応用した多層積層の抑制技術により、高 mobility な有機トランジスタの実現を目指しています。また、Mott絶縁体や電荷移動錯体を用いた新規有機半導体の電子状態と場効果特性の解明も進んでいます。
Figures are computed from collected data and may differ slightly.
We report ambipolar field-effect characteristics observed in metal-insulator-semiconductor field-effect transistor (MISFET) device structures based on organic single crystals of the quasi-one-dimensional (Q1D) Mott-Hubbard insulator (BEDT-TTF)$({\mathrm{F}}_{2}\text{TCNQ})$. The main aspects of the measured field-effect properties are well described by the symmetric-gate FET model, which considers the device symmetry of triode FET structures. The temperature-dependent nonlinear nature in the gat
A unique solution-based technology to manufacture self-assembled ultrathin organic-semiconductor layers with ultrauniform single-molecular-bilayer thickness over an area as large as wafer scale is developed. A novel concept is adopted in this technique, based upon the idea of geometrical frustration, which can effectively suppress the interlayer stacking (or multilayer crystallization) while maintaining the assembly of the intralayer, which originates from the strong intermolecular interactions
We report structural, electronic, and field-effect transistor characteristics of layered crystalline donor–acceptor semiconductors with dialkylated benzothienobenzothiophenes.
Meniscus, a curvature of droplet surface around solids, takes critical roles in solution-based thin-film processing. Extension of meniscus shape, and eventual uniform film growth, is strictly limited on highly lyophobic surfaces, although such surface should considerably improve switching characteristics. Here, we demonstrate a technique to control the solution meniscus, allowing to manufacture single-crystalline organic semiconductor (OSC) films on the highest lyophobic amorphous perfluoropolym
We report synthesis and examination of the electronic properties of an isomorphous series of mixed-stack organic charge-transfer complexes, composed of [bis(ethylenedithio)tetrathiafulvalene] (BEDT-TTF)-based electron donors and electron acceptors of halogen-substituted tetracyanoquinodimethanes (TCNQ's). Single crystals of ${(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})(\mathrm{M}\mathrm{e}}_{2}\mathrm{TCNQ}),$ (BEDT-TTF)(ClMeTCNQ), and ${(\mathrm{B}\mat
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