Diketopyrrolopyrrole-Thiophene-Based Acceptor-Donor-Acceptor Conjugated Materials for High-Performance Field-Effect Transistors

被引:35
作者
Lu, Chien [1 ]
Chen, Wen-Chang [1 ]
机构
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
关键词
conjugation; donor-acceptor systems; field-effect transistors; semiconductors; thiophenes; THIN-FILM TRANSISTORS; ORGANIC SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; SMALL-MOLECULE; PHOTOVOLTAIC CELLS; TRIFLUOROMETHYLPHENYL GROUPS; SEMICONDUCTING POLYMERS; CARRIER MOBILITY; FUSED THIOPHENES; CO-OLIGOMERS;
D O I
10.1002/asia.201300677
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report the synthesis, morphology, and field-effect-transistor (FET) characteristics of new acceptor-donor-acceptor conjugated materials that consist of diketopyrrolopyrrole (DPP) acceptor groups and one of four different thiophene moieties, that is, dithiophene (2T), thieno[3,2-b]-thiophene (TT), dithieno[3,2-b:2,3-d]-thiophene (DTT), and 5,5-di-(2-ethylhexyl)-[2,3;5,2;4,2]quaterthiophene (4T). The optical band gaps of the as-prepared materials are smaller than 1.7eV, which is attributed to the strong intramolecular charge transfer and the backbone coplanarity of the thiophene moieties. The order of both crystallinity and FET mobility (x10(-2)-x10(-4)cm(2)V(-1)s(-1)) is TT2DPP>4T2DPP>2T2DPP>DTT2DP, which differ in the structure of the -conjugated cores and core symmetry. Well-ordered intermolecular chain packing was confirmed by the GIXD and AFM results. In particular, the FET hole mobility of TT2DPP was further improved to 0.1cm(2)V(-1)s(-1), which was attributed to the well-interconnected structure through solution-shearing. These experimental results suggest the potential applications of the new DPPthiopheneDPP conjugated materials for organic electronic devices.
引用
收藏
页码:2813 / 2821
页数:9
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