Formation of Photoconductive Nanowires of Tetracene Derivative in Composite Thin Film

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• 作者：Tsuyoshi Suzuki ; Toshihiro Okamoto ; Akinori Saeki ; Shu Seki ; Hiroyasu Sato ; Yutaka Matsuo
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 27, 2013
• 年：2013
• 卷：5
• 期：6
• 页码：1937-1942
• 全文大小：455K
• 年卷期：v.5,no.6(March 27, 2013)
• ISSN：1944-8252

文摘

Nanowires of tetracene dicarboxylic imide disulfide with an N-hexyl substituent (HexylTIDS) were successfully constructed in composite thin film containing poly(3-hexylthiophene) (P3HT). The nanowire structures were investigated by atomic force microscopy and scanning electron microscopy. The photoconductivity of the composite films was evaluated by time-resolved microwave conductivity measurements, revealing that the film containing a 1:1 w/w ratio of HexylTIDS and P3HT exhibited the highest photoconductivity (2.1 脳 10^鈥? m²/(V s)). The intermolecular interactions of HexylTIDS molecules were important in nanowire formation. These results suggest a one-step method for fabricating small-molecule-based nanowires in composite films from a blended solution. This type of composite film, and its fabrication method, will be useful for developing organic thin-film photoelectronic devices.

Keywords:

organic semiconductor; tetracene; nanowire; intermolecular interaction; charge transport