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Electrical transport study of phenylene-based π-conjugated molecules in a three-terminal geometry

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons47960

Grimsdale,  Andrew C.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Lee, J. O., Lientschnig, G., Wiertz, F. G. H., Struijk, M., Janssen, R. A. J., Egberink, R., et al. (2003). Electrical transport study of phenylene-based π-conjugated molecules in a three-terminal geometry. Annals of the New York Academy of Sciences, 1006, 122-132.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-6435-1
Zusammenfassung
We fabricated three-terminal devices with conjugated molecules. Two different device layouts were used to measure both very short molecules (with one or two benzene rings) and relatively long ones (as long as 8 nm). To achieve an optimum gate effect, we used aluminum gates covered with a very thin native oxide layer. Molecules with thiol end groups were positioned between the source and drain electrodes by self-assembly. The device yield was low for short molecules, most likely due to defects in the self-assembled monolayers. Most of the devices made with short molecules did not show any gate effect at all; a small gate effect was only observed in two samples made with 1,3-benzenedithiol. Some devices showed clear negative differential conductance peaks. In some devices made with long molecules, we observed a small change of conductance with gate voltage.