Inkjetted crystalline single monolayer oligothiophene OTFTs

Crystalline monolayer films of a novel organic semiconducting material were deposited as the active layer for organic thin-film transistors (OTFTs) via inkjet printing. Devices exhibited field-effect mobilities up to 0.07 cm/sup 2//V/spl middot/s and on/off ratios >10/sup 8/, surpassing values me...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2006-04, Vol.53 (4), p.594-600
Main Authors: Chang, P.C., Molesa, S.E., Murphy, A.R., Frechet, J.M.J., Subramanian, V.
Format: Article
Language:English
Subjects:
Applied sciences
Crystal defects
Crystal structure
Density
Deposition
Devices
Electronics
Exact sciences and technology
Hardware
Inkjet
Inkjet printing
Input-output equipment
monolayer
Monolayers
oligothiophene
organic thin-film transistor (OTFT)
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Thin film transistors
Thin films
Transistors
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Summary:Crystalline monolayer films of a novel organic semiconducting material were deposited as the active layer for organic thin-film transistors (OTFTs) via inkjet printing. Devices exhibited field-effect mobilities up to 0.07 cm/sup 2//V/spl middot/s and on/off ratios >10/sup 8/, surpassing values measured for devices cast with thicker films of the same material. The printed monolayer devices exhibited superior subthreshold characteristics with less hysteresis, and defect and trap densities are improved over thicker film analogs. These results show that solution deposition techniques such as inkjet printing can result in the monolayer crystalline thin films that are requisite for near-ideal electrostatics in OTFTs.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2006.870885