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A Highly π-Stacked Organic Semiconductor for Field-Effect Transistors Based on Linearly Condensed Pentathienoacene
- Source :
- Journal of the American Chemical Society. 127:13281-13286
- Publication Year :
- 2005
- Publisher :
- American Chemical Society (ACS), 2005.
-
Abstract
- 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 larger band gap than most semiconductors used in organic field-effect transistors (OFETs) and therefore is expected to be stable in air. The large pi-conjugated and planar molecular structure of PTA would also form higher molecular orders that are conductive for carrier transport. X-ray diffraction and atomic force microscopy experiments on its films show that the molecules stack in layers with their long axis upright from 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-type semiconductors are also presented. A high mobility of 0.045 cm(2)/V s and an on/off ratio of 10(3) for a PTA OFET have been achieved, demonstrating the potential of PTA for application in future organic electronics.
- Subjects :
- Organic electronics
Electron mobility
Organic field-effect transistor
Molecular Structure
Transistors, Electronic
business.industry
Band gap
Chemistry
Electric Conductivity
Temperature
Thiophenes
General Chemistry
Microscopy, Atomic Force
Biochemistry
Catalysis
Pentacene
Organic semiconductor
chemistry.chemical_compound
Colloid and Surface Chemistry
Optics
Semiconductor
Semiconductors
Optoelectronics
Field-effect transistor
business
Subjects
Details
- ISSN :
- 15205126 and 00027863
- Volume :
- 127
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....262c98b9a97430ba68a1eaf0a8830a1f