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题名: Approaching high charge carrier mobility by alkylating both donor and acceptor units at the optimized position in conjugated polymers
作者: Gao, Dong1, 2; Tian, Kui1, 2; Zhang, Weifeng1; Huang, Jianyao1; Chen, Zhihui1, 2; Mao, Zupan1, 2; Yu, Gui1, 2
刊名: POLYMER CHEMISTRY
发表日期: 2016
卷: 7, 期:24, 页:4046-4053
收录类别: SCI
英文摘要: Flexible side chains have been the central issue in the design of solution-processable polymer semi-conducting materials. On identical conjugated backbones, great differences can be made with different side chain densities and substitution positions. Generally, for donor-acceptor (D-A) copolymers, increasing the side chain density could readily improve the solubility of the polymers. However, it also results in backbone distortion and weaker interchain interactions, thus hindering charge transport, which limits the application of highly soluble D-A polymers. Herein, we synthesized two polymers of PD-n-DTTE-7 with both the moieties alkylated. Substituting side chains to DTTE units improved the solubility of the corresponding polymers. Induced by the promoted solubility, high purity of the high molecular weight component was obtained and uniform films were formed with these high molecular weight polymers. In addition, by carefully selecting the conjugation system and substitution positions, ordered packing and backbone coplanarity were also achieved, which facilitate interchain and intrachain charge transport. Through a simple spin coating technique, the polymers, PD-n-DTTE-7s, present the highest hole mobility of 9.54 cm(2) V-1 s(-1) with high average mobilities of over 5 cm(2) V-1 s(-1), which are among the highest values for polymer-based field-effect transistors.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35568
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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