A Highly -Stacked Organic Semiconductor for Field-Effect Transistors Based on Linearly Condensed Pentathienoacene
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- 作者：Kai Xiao ; Yunqi Liu ; Ting Qi ; Wei Zhang ; Fang Wang ; Jianhua Gao ; Wenfeng Qiu ; Yongqiang Ma ; Guanglei Cui ; Shiyan Chen ; Xiaowei Zhan ; Gui Yu ; Jingui Qin ; Wenping Hu ; and Daoben Zhu
- 刊名：Journal of the American Chemical Society
- 出版年：2005
- 出版时间：September 28, 2005
- 年：2005
- 卷：127
- 期：38
- 页码：13281 - 13286
- 全文大小：485K
- 年卷期：v.127,no.38(September 28, 2005)
- ISSN：1520-5126
文摘
We present the synthesis and characterization of a fused-ring compound, dithieno[2,3-d:2',3'-d']thieno[3,2-b:4,5-b']dithiophene (pentathienoacene, PTA). In contrast to pentacene, PTA has a largerband gap than most semiconductors used in organic field-effect transistors (OFETs) and therefore isexpected to be stable in air. The large 
-conjugated and planar molecular structure of PTA would alsoform higher molecular orders that are conductive for carrier transport. X-ray diffraction and atomic forcemicroscopy experiments on its films show that the molecules stack in layers with their long axis uprightfrom the surface. X-ray photoelectron spectroscopy suggests that there are no chemical bonds at the PTA/Au interface. OFETs based on the PTA have been constructed, and their performances as p-typesemiconductors are also presented. A high mobility of 0.045 cm2/V s and an on/off ratio of 103 for a PTAOFET have been achieved, demonstrating the potential of PTA for application in future organic electronics.
-conjugated and planar molecular structure of PTA would alsoform higher molecular orders that are conductive for carrier transport. X-ray diffraction and atomic forcemicroscopy experiments on its films show that the molecules stack in layers with their long axis uprightfrom the surface. X-ray photoelectron spectroscopy suggests that there are no chemical bonds at the PTA/Au interface. OFETs based on the PTA have been constructed, and their performances as p-typesemiconductors are also presented. A high mobility of 0.045 cm2/V s and an on/off ratio of 103 for a PTAOFET have been achieved, demonstrating the potential of PTA for application in future organic electronics.