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Interfacial Energy Level Alignment at Acid Oxidized Carbon Nanotube - Triphenyldiamine Contacts

Published online by Cambridge University Press:  01 February 2011

Li Wei Tan ,
Ross A. Hatton ,
Cristina E. Giusca  and
Ravi Silva
Li Wei Tan
Affiliation:
Li.Wei.Tan@merckchem.co.ukl.tan@surrey.ac.uk, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, United Kingdom
Ross A. Hatton
Affiliation:
ross.hatton@warwick.ac.uk, Department of Chemistry, University of Warwick, Conventry, United Kingdom
Cristina E. Giusca
Affiliation:
c.giusca@surrey.ac.uk, Advanced Technology Institute, University of Surrey, Guildford, United Kingdom
Ravi Silva
Affiliation:
s.silva@surrey.ac.uk, Advanced Technology Institute, University of Surrey, Guildford, United Kingdom
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Abstract

We report an ultraviolet photoelectron spectroscopy study of the energetics at the interface between acid oxidised carbon nanotubes and the archetypical molecular N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'biphenyl-4,4'diamine(TPD). Electrical equilibrium is achieved across both interfaces within the experiment time frame due to the formation of an interfacial dipole layer which abruptly shifts the vacuum level at the interface. To the authors knowledge this is the first reported measurement of the electronic structure of a carbon nanotube / organic semiconductor interface; a system in which the magnitude of the dipole layer formed at the interface upon contact formation is proportional to the difference in work function between the substrate and organic semiconductor overlayer.

Keywords

organicCnanoscale
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1258: Symposia P/Q/R – Low-Dimensional Functional Nanostructures-Fabrication, Characterization and Applications , 2010 , 1258-R07-06
Copyright
Copyright © Materials Research Society 2010

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