Diketopyrrolopyrrole-Based π-Conjugated Copolymer Containing β-Unsubstituted Quintetthiophene Unit: A Promising Material Exhibiting High Hole-Mobility for Organic Thin-Film Transistors

被引：85

作者：

Yi, Zhengran ^{[1
,2
]}

Sun, Xiangnan ^{[3
]}

Zhao, Yan ^{[3
]}

Guo, Yunlong ^{[3
]}

Chen, Xingguo ^{[1
,2
]}

Qin, Jingui ^{[1
,2
]}

Yu, Gui ^{[3
]}

Liu, Yunqi ^{[3
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Beijing 100190, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2012年 / 24卷 / 22期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

donor-acceptor copolymer; organic thin-film transistors; hole mobility; HIGH-PERFORMANCE AMBIPOLAR; FIELD-EFFECT TRANSISTORS; MOLECULAR PACKING; POLYMER; SEMICONDUCTORS; TRANSPORT; ACCEPTOR; DONOR; MORPHOLOGY;

D O I：

10.1021/cm302341m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new diketopyrrolopyrrole-based pi-conjugated copolymer (PDPP5T) with high molecular weight has been synthesized by Stille coupling polymerization of 3,6-bis(5-bromothiophen-2-yl)-2,5-bis(2-octyldodecyl)pyrrolo-[3,4-c]-pyrrole-1,4(2H,5H)-dione with alpha,alpha'-bis(trimethylstannyl)-terthiophene. Its hole mobility without thermal annealing reaches 1.08 cm(2) V-1 s(-1), and a higher hole mobility of 3.46 cm(2) V-1 s(-1) is obtained annealed at 200 degrees C directly in an air atmosphere. This indicates that introducing a longer beta-unsubstituted quinquethiophene (5T) unit into the main-chain of DPP-oligothiophene copolymer produces much pronounced p-type behavior and also reduces the steric hindrance of the bulk side-chain groups, which is favorable to enhance the molecular ordering capability at low temperatures and improve the organic thin-film transistors (OTFT) performances. This work demonstrates that PDPP5T is a promising material that can be applied to the cost-effective and large-scale production of OTFTs.

引用

页码：4350 / 4356

页数：7

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