Effect of the length and branching point of alkyl side chains on DPP-thieno [3,2-b]thiophene copolymers for organic thin-film transistors

Chen Shaoyun; Meng Yuezhong; Li Yuning; Qu Bo; Zhuo Dongxian

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Effect of the length and branching point of alkyl side chains on DPP-thieno [3,2-b]thiophene copolymers for organic thin-film transistors

机译：烷基侧链长度和支化点对有机薄膜晶体管DPP-噻吩并[3,2-b]噻吩共聚物的影响

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Solid-state packing and polymer orientation are critical for achieving high charge carrier mobility in organic thin-film transistors. Four side chain substituents, 2-octyldodecyl (-20), 4-octyltetradecyl (-22), 2-decyltetradecyl (-24), and 4-decylhexadecyl (-26), were synthesized to study the effect of side chains on the molecular crystallinity and charge transport properties of diketopyrrolopyrrole-thieno[3,2-bjthiophene copolymers (DPPTTs). Achieving high-performance DPP-based polymers not only depends on crystallinity, but also on the appropriate proportions of polymer chain orientations. DPPTT22 and DPPTT26 have more coplanarity of the backbone structure and a shorter pi-pi stacking distance, but the charge mobilities are limited. The objective of this study is to determine the influence of different side chains on the layer distance and pi-pi stacking regarding 3D carrier channel formation. However, a favorable morphology is also important to improve the charge mobility. DPPTT24 shows improved mobility due to its suitable edge-on-oriented crystallinity and well-interconnected domains with small grain boundaries.

机译：固态堆积和聚合物取向对于实现有机薄膜晶体管中的高载流子迁移率至关重要。合成了四个侧链取代基2-辛基十二烷基（-20），4-辛基十四烷基（-22），2-癸基十四烷基（-24）和4-癸基十六烷基（-26）以研究侧链对分子的影响二酮吡咯并吡咯并噻吩并[3,2-bj噻吩共聚物（DPPTT）的结晶度和电荷传输性质。实现高性能的基于DPP的聚合物不仅取决于结晶度，而且取决于聚合物链取向的适当比例。 DPPTT22和DPPTT26具有更大的主链结构共面性和更短的pi-pi堆叠距离，但电荷迁移率受到限制。这项研究的目的是确定关于3D载流子通道形成的不同侧链对层距离和pi-pi堆叠的影响。但是，良好的形态对于提高电荷迁移率也很重要。 DPPTT24由于具有合适的边沿定向结晶性和具有小晶粒边界的良好互连的畴，因此显示出改善的迁移率。

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来源
《Optical Materials》 |2019年第2期|500-507|共8页
作者
Chen Shaoyun; Meng Yuezhong; Li Yuning; Qu Bo; Zhuo Dongxian;
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作者单位

Quanzhou Normal Univ, Coll Chem Engn & Mat Sci, Quanzhou 362000, Fujian, Peoples R China;

Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Key Lab Low Carbon Chem & Energy Conservat Guangd, Guangzhou 510275, Guangdong, Peoples R China;

Univ Waterloo, Dept Chem Engn, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada|Univ Waterloo, WIN, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada;

Quanzhou Normal Univ, Coll Chem Engn & Mat Sci, Quanzhou 362000, Fujian, Peoples R China;

Quanzhou Normal Univ, Coll Chem Engn & Mat Sci, Quanzhou 362000, Fujian, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
pi-conjugation; Organic thin film transistor(OTFT); Diketopyrrolopyrrole-thieno3,2-bthiophene copolymers (DPPTTs); Solidstate packing; Polymer orientation;

机译：π共轭;有机薄膜晶体管;二酮吡咯并吡咯并噻吩并[3,2-b]噻吩共聚物;固相堆积;聚合物取向;

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1. A High Mobility P-Type DPP-Thieno[3,2-b]thiophene Copolymer for Organic Thin-Film Transistors [J] . Yuning Li, Samarendra P. Singh, Prashant Sonar Advanced Materials . 2010,第43期

机译：用于有机薄膜晶体管的高迁移率P型DPP-噻吩并[3,2-b]噻吩共聚物
2. Donor-acceptor-donor conjugated oligomers based on isoindigo and anthra[1,2-b]thieno[2,3-d]thiophene for organic thin-film transistors: the effect of the alkyl side chain length on semiconducting properties [J] . Shao Jing, Zhang Xiaojie, Tian Hongkun, Journal of Materials Chemistry, C. materials for optical and electronic devices . 2015,第29期

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4. Influence of the Alkyl Side-Chain Length on the Packing of Poly (2,5-bis(3–alkyl thiophene –2–yl) thieno3,2-b thiophene) (PBTTT) Studied using Molecular Simulations [C] . Eunkyung Cho, Dongwook Kim, Chad Risko PMSE Symposia . 2010

机译：使用分子模拟研究了烷基侧链长度对聚（2,5-双（三烷基噻吩-2-基）噻吩3,2-B噻吩的噻吩3,2-B噻吩的填充物（PBTTT）
5. Study of Fused Thiophene Based Organic Semiconductors and Interfacial Self-Assembled Monolayer (SAM) for Thin-Film Transistor (TFT) Application. [D] . Youn, Jangdae. 2012

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7. Alkyl Chain Extension as a Route to Novel Thieno[3,2-b]thiophene Flanked Diketopyrrolopyrrole Polymers for Use in Organic Solar Cells and Field Effect Transistors [O] . Meager, I, Ashraf, RS, Rossbauer, S, 2013

机译：烷基链延伸作为新型噻吩并[3,2-b]噻吩侧翼二酮吡咯并吡咯聚合物的途径，用于有机太阳能电池和场效应晶体管

Effect of the length and branching point of alkyl side chains on DPP-thieno [3,2-b]thiophene copolymers for organic thin-film transistors

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