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Solution Processed Self-Assembled Monolayer Gate Dielectrics for Low-Voltage Organic Transistors

Published online by Cambridge University Press:  01 February 2011

James Ball ,
Paul H Wöbkenberg ,
Florian Colléaux ,
Floris B Kooistra ,
Jan C Hummelen ,
Donal D. C. Bradley  and
Thomas D Anthopoulos
James Ball
Affiliation:
j.ball07@imperial.ac.uk, Imperial College London, Department of Physics, London, United Kingdom
Paul H Wöbkenberg
Affiliation:
paul.wobkenberg@imperial.ac.uk, Imperial College London, Department of Physics, London, United Kingdom
Florian Colléaux
Affiliation:
florian.colleaux@imperial.ac.uk, Imperial College London, Department of Physics, London, United Kingdom
Floris B Kooistra
Affiliation:
floriskooistra@wanadoo.nl, Zernike Institute for Advanced Materials, Groningen, Netherlands
Jan C Hummelen
Affiliation:
j.c.hummelen@rug.nl, Zernike Institute for Advanced Materials, Groningen, Netherlands
Donal D. C. Bradley
Affiliation:
d.bradley@imperial.ac.uk, Imperial College London, Department of Physics, London, United Kingdom
Thomas D Anthopoulos
Affiliation:
thomas.anthopoulos@imperial.ac.uk, Imperial College London, Department of Physics, London, United Kingdom
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Abstract

Low-voltage organic transistors are sought for implementation in high volume low-power portable electronics of the future. Here we assess the suitability of three phosphonic acid based self-assembling molecules for use as ultra-thin gate dielectrics in low-voltage solution processable organic field-effect transistors. In particular, monolayers of phosphonohexadecanoic acid in metal-monolayer-metal type sandwich devices are shown to exhibit low leakage currents and high geometrical capacitance comparable to previously demonstrated self-assembled monolayer (SAM) type dielectrics but with a higher surface energy. The improved surface energy characteristics enable processing of a wider range of organic semiconductors from solution. Transistors based on a number of solution-processed organic semiconductors with operating voltages below 2 V are also demonstrated.

Keywords

organicsemiconductingdevices
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1114: Symposium G – Organic and Hybrid Materials for Large-Area Functional Systems , 2008 , 1114-G09-02
Copyright
Copyright © Materials Research Society 2009

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References

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