New Semiconducting Multi-branched Conjugated Molecules Bearing 3,4-Ethylenedioxythiophene-based Thiophenyl Moieties for Organic Field Effect Transistor

被引：9

作者：

Kim, Dae Chul ^{[1
]}

Lee, Tae Wan ^{[1
]}

Lee, Jung Eun ^{[1
]}

Kim, Kyung Hwan ^{[1
]}

Cho, Min Ju ^{[1
]}

Choi, Dong Hoon ^{[1
]}

Han, Yoon Deok ^{[2
]}

Cho, Mi Yeon ^{[2
]}

Joo, Jin-soo ^{[2
]}

机构：

[1] Korea Univ, Dept Chem, Adv Mat Chem Res Ctr, Seoul 136701, South Korea

[2] Korea Univ, Dept Phys, Seoul 136701, South Korea

来源：

MACROMOLECULAR RESEARCH | 2009年 / 17卷 / 07期

关键词：

conjugated semiconductor; multi-branched molecule; mobility; organic field effect transistor; organic phototransistor; OLIGOTHIOPHENE-FUNCTIONALIZED TRUXENE; STAR-SHAPED OLIGOTHIOPHENES; THIN-FILM TRANSISTORS; ELECTRONIC-PROPERTIES; OPTICAL-PROPERTIES; NANOCOMPOSITES; OLIGOMERS; MOBILITY; SYSTEMS;

D O I：

10.1007/BF03218897

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

New pi-conjugated multi-branched molecules were synthesized through the Homer-Emmons reaction using alkyl-substituted, 3,4-ethylenedioxythiophene-based, thiophenyl aldehydes and octaethyl benzene-1,2,4,5-tetrayltetrakis(methylene) tetraphosphonate as the core unit; these molecules have all been fully characterized. The two multi-branched conjugated molecules exhibited excellent solubility in common organic solvents and good self-film forming properties. The semiconducting properties of these multi-branched molecules were also evaluated in organic field-effect transistors (OFET). With octyltrichlorosilane (OTS) treatment of the surface of the SiO2 gate insulator, two of the crystalline conjugated molecules, 7 and 8, exhibited carrier mobilities as high as 2.4 (+/-0.5) x 10(-3) and 1.3 (+/-0.5) x 10(-3) cm(2)V(-1)s(-1) respectively. The mobility enhancement of OFET by light irradiation (lambda = 436 nm) supported the promising photo-controlled switching behavior for the drain current of the device.

引用

页码：491 / 498

页数：8

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