Synthesis and Characterization of Novel Semiconductors Based on Thieno[3,2-b][1]benzothiophene Cores and Their Applications in the Organic Thin-Film Transistors

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• 作者：Huajie Chen ; Qingyu Cui ; Gui Yu ; Yunlong Guo ; Jianyao Huang ; Minliang Zhu ; Xiaojun Guo ; Yunqi Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：December 8, 2011
• 年：2011
• 卷：115
• 期：48
• 页码：23984-23991
• 全文大小：1054K
• 年卷期：v.115,no.48(December 8, 2011)
• ISSN：1932-7455

文摘

The synthesis and characterization of four new organic semiconductors with thieno[3,2-b][1]benzothiophene cores and different 蟺-bridge spacers are reported. Cyclic voltammetry measurement indicates that the materials have low energy levels of the highest occupied molecular orbitals and large band gaps. The single-crystal X-ray diffraction experiment reveals that 1,2-di(thieno[3,2-b][1]benzothiophenic-2-)ethylene (DTBTE) molecules have a nearly coplanar structure and crystallize into a herringbone arrangement with strongly intermolecular multiple S路路路S, S路路路C, and CH路路路蟺 interactions. These interactions facilitate charge carrier transport. The DTBTE-based organic thin-film transistors (OTFTs) on an octyltrichlorosilane-modified SiO₂/Si substrate exhibit good field-effect performance with the highest mobility of 0.50 cm² V^鈥? s^鈥?. Furthermore, the DTBTE-based OTFTs have been fabricated on a flexible polyethylene terephthalate substrate and showed a maximum mobility of up to 0.45 cm² V^鈥? s^鈥?, indicating its potential application as an organic semiconductor in the flexible OTFTs.