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题名: Highly planar cross-conjugated alternating polymers with multiple conformational locks: synthesis, characterization and their field-effect properties
作者: Zhang, Weifeng1; Mao, Zupan1; Zheng, Naihang1; Zou, Jiabin2; Wang, Liping2; Wei, Congyuan1; Huang, Jianyao1; Gao, Dong1; Yu, Gui1, 3
刊名: JOURNAL OF MATERIALS CHEMISTRY C
发表日期: 2016-10-21
卷: 4, 期:39, 页:9266-9275
收录类别: SCI
英文摘要: It is meaningful to explore new design principles for organic semiconductors. Herein, we have developed two cross-conjugated alternating polymers based on 1,2-di(thiophen-2-yl)ethane-1,2-dione (DTO), namely PDTO-C1 and PDTO-C3, and investigated their charge transport properties by fabricating field-effect transistors devices. Single crystal X-ray crystallography shows that non-covalent S center dot center dot center dot O and C-H center dot center dot center dot 0 interactions exist inside the DTO units. These non-covalent interactions in combination with the C-H center dot center dot center dot 0 interactions of the thiophene-flanked dithienothiophene units, acting as conformational locks, are beneficial for acquiring the planar backbone conformation. PDTO-C1 and PDTO-C3 possess broad absorption spectra and HOMO and LUMO energy levels of ca. -5.50 and-3.6 eV, respectively. The highest mobility of 0.54 cm(2) V-1 s(-1) was achieved in the PDTO-C3-based transistor devices, whereas PDTO-C1 affords a mobility of 0.22 cm(2) V-1 s(-1). Further thin film microstructure investigations indicate that both polymers can form highly-ordered lamellar packing with small pi-pi stacking distances down to 3.50 angstrom. These results demonstrate that the incorporation of cross-conjugation may be used as an additional design tactic for organic semiconductors to alter their optoelectronic properties.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35086
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, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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