Alkylsubstituted Thienothiophene Semiconducting Materials: Structure-Property Relationships

被引：113

作者：

He, Mingqian ^{[1
]}

Li, Jianfeng ^{[1
]}

Sorensen, Michael L. ^{[1
]}

Zhang, Feixia ^{[1
]}

Hancock, Robert R. ^{[1
]}

Fong, Hon Hang

Pozdin, Vladimir A.

Smilgies, Detlef-M. ^{[2
]}

Malliaras, George G. ^{[2
]}

机构：

[1] Corning Inc, Corning, NY 14830 USA

[2] Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 33期

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

FIELD-EFFECT MOBILITY; ORGANIC SEMICONDUCTORS; CHARGE-TRANSPORT; COPOLYMERS; PERFORMANCE; POLYTHIOPHENE; TRANSISTORS; POLYMERS;

D O I：

10.1021/ja903895s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A family of conjugated polymers with fused structures consisting of three to five thiophene rings and with the same alkyl side chains has been synthesized as a means to understand structure-property relationships. All three polymers showed well-extended conjugation through the polymer backbone. Ionization potentials (IP) ranged from 5.15 to 5.21 eV; these large values are indicative of their excellent oxidative stability. X-ray diffraction and AFM studies suggest that the polymer with the even number of fused thiophene rings forms a tight crystalline structure due to its tilted side chain arrangement. On the other hand, the polymers with the odd number of fused thiophene rings packed more loosely. Characterization in a field-effect transistor configuration showed that the mobility of the polymer with the even number of rings is 1 order of magnitude higher than its odd-numbered counterparts. Through this structure-property study, we demonstrate that proper design of the molecules and properly arranged side chain positions on the polymer backbone can greatly enhance polymer electronic properties.

引用

页码：11930 / 11938

页数：9

共 45 条

[1] Electrochemical properties and electronic structures of conjugated polyquinolines and polyanthrazolines [J].