Title
Organic field-effect transistors as a test-bed for molecular electronics: A combined study with large-area molecular junctions
Author
Asadi, K.
Katsouras, I.
Harkema, J.
Gholamrezaie, F.
Smits, E.C.P.
Biscarini, F.
Blom b, P.W.M.
de Leeuw, D.M.
Publication year
2012
Abstract
The contact resistance of a transistor using self-assembled monolayer (SAM)-modified source and drain electrodes depends on the SAM tunnel resistance, the height of the injection barrier and the morphology at the contact. To disentangle the different contributions, we have combined here the transmission line measurements in transistors with transport measurements of SAMs in large-area molecular junctions. The tunnel resistance of the SAM has been independently extracted in two-terminal large-area molecular junctions. We show that the tunneling resistance of the SAM can be added linearly to the contact resistance of the transistor with bare Au electrodes, to account for the increased contact resistance in the SAM- modified transistor. The observed agreement is discussed. The manifestation of the SAM in the contact resistance shows that transistors can potentially be used as an experimental test-bed for molecular electronics.
Subject
Mechatronics, Mechanics & Materials
HOL - Holst
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
Charge injection
Self-assembled monolayer
Organic field-effect transistor
Molecular junction
Contact resistance
Tunneling
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http://resolver.tudelft.nl/uuid:af00a451-86ad-4117-9e8d-36fee0fdbe16
TNO identifier
472186
Publisher
Elsevier
Source
Organic Electronics
Document type
article