Using unsorted single-wall carbon nanotubes to enhance mobility of diketopyrrolopyrrole-quarterthiophene copolymer in thin-film transistors

被引：6

作者：

Smithson, Chad ^{[1
,2
]}

Wu, Yiliang ^{[2
]}

Wigglesworth, Tony ^{[2
]}

Gardner, Sandra ^{[2
]}

Zhu, Shiping ^{[1
]}

Nie, Heng-Yong ^{[3
]}

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L8, Canada

[2] Xerox Res Ctr Canada Ltd, Adv Mat Lab, Mississauga, ON L5K 2L1, Canada

[3] Univ Western Ontario, Surface Sci Western, London, ON N6G 0J3, Canada

来源：

ORGANIC ELECTRONICS | 2014年 / 15卷 / 11期

关键词：

Organic thin-film transistors; Single-wall carbon nanotubes; Diketopyrrolepyrrole-quarterthiophene copolymer; Field effect mobility; Current on/off ratio; LARGE-SCALE; POLYMER; ELECTRONICS; DISPERSION; DIAMETER; ARRAYS; LIMITS;

D O I：

10.1016/j.orgel.2014.07.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Organic thin film transistors (OTFTs) were fabricated for the first time using a semiconductor copolymer of diketopyrrolopyrrole-quarterthiophene (DPP-QT) and unsorted single walled carbon nanotubes (SWCNTs). Three different SWCNTs having different tube diameters, length, and shape were used to investigate the effects of carbon nanotubes' properties on dispersion of the SWCNTs in DPP-QT polymer, as well as the mobility and current on/off ratio of the OTFTs. The DPP-QT polymer was able to selectively disperse two types of SWCNTs. An optimal SWCNT loading was found to be 1.5-2.5 wt% for these SWCNTs, before the on/off ratio fell below 10(5) due to increased metallic tube content of the film. At this optimal loading, the field effect mobility was improved by a factor of two, with the maximum mobility reaching 1.3 cm(2) V-1 s(-1), when the SWCNTs with a short length and small tube diameter were used. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：2639 / 2646

页数：8

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