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The Effect of Surface Preparation on the Structure and Electrical Transport in an Organic Semiconductor

Published online by Cambridge University Press:  21 March 2011

Laura L. Kosbar ,
Christos D. Dimitrakopoulos  and
Debra J. Mascaro
Laura L. Kosbar
Affiliation:
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, U.S.A.
Christos D. Dimitrakopoulos
Affiliation:
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598, U.S.A.
Debra J. Mascaro
Affiliation:
Department of Materials Science and Engineering, MIT Cambridge, MA 02139
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Abstract

Self-assembled monolayers (SAMs) with a variety of structures and terminal groups were evaluated as underlayers for pentacene deposition. It was found that the most critical factor in the formation of highly oriented thin film pentacene with large grain size was the geometric structure of the monolayer. Monolayers with terminal bonds parallel to the surface produce large pentacene grains with an angular rather than the dendridic structure normally observed on octadecyltrichlorosilane (OTS) coated substrates. The grain size, X-ray scattering, carrier mobility, and current on/off ratios are all improved with monolayers of the appropriate geometry.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 665: Symposium C – Electronic, Optical and Optoelectronic Polymers and Oligomers , 2001 , C10.6
Copyright
Copyright © Materials Research Society 2001

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References

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