Design, Synthesis, and Properties of Asymmetrical Heteroacene and Its Application in Organic Electronics

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• 作者：Chunyan Du ; Yunlong Guo ; Jianming Chen ; Hongtao Liu ; Ying Liu ; Shanghui Ye ; Kun Lu ; Jian Zheng ; Ti Wu ; Yunqi Liu ; Zhigang Shuai ; Gui Yu
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：June 17, 2010
• 年：2010
• 卷：114
• 期：23
• 页码：10565-10571
• 全文大小：334K
• 年卷期：v.114,no.23(June 17, 2010)
• ISSN：1932-7455

文摘

Asymmetrical heteroacene up to six fused rings, tetraceno[2,3-b]benzo[d]thiophene (TBT), was synthesized facilely and its physicochemical properties and device applications were investigated. Field-effect transistors (FETs) fabricated with TBT as semiconducting layers showed carrier mobility up to 0.13 cm² V⁻¹ s⁻¹. The transistors also exhibited a photoeffect and a ratio of photocurrent to dark-current as high as 10⁴ was achieved. Density functional theory and FET results demonstrated that, for bent heteroacenes, increasing a benzene ring in conjugation length would not result in higher field-effect mobility, and the FET performance is more influenced by the thin film morphology. All these results suggest that the introduction of heteroatoms provides an efficient route for exploring the chemistry of larger acenes.