Dependence of charge carrier injection on the interface energy barrier in short-channel polymeric field effect transistors
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2012Access:
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Alborghetti, S, Coey, JMD, Stamenov, P, Dependence of charge carrier injection on the interface energy barrier in short-channel polymeric field effect transistors, Applied Physics Letters, 100, 2012, 143301-Download Item:
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Abstract:
The influence of contact materials on the electrical characteristics of field-effect transistors made
from poly(3-hexylthiophene) with short-channel lengths of 80nm is investigated. The thermally
activated output current indicates the presence of a potential barrier at the electrode/organic
contact. The barrier is not related to surface oxide and results in non-linear junction characteristics
with activation voltage that can be only partially controlled via the work function of the contact
metal. A Schottky contact at the metal/polymer interface arises from the band offset of the
two materials and from interfacial dipole layers. Transistor operation with on/off ratio over 10
3
is achieved with five different electrode materials
Sponsor
Grant Number
Science Foundation Ireland (SFI)
10/IN1/I3002
Author's Homepage:
http://people.tcd.ie/jcoeyhttp://people.tcd.ie/stamenp
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Author: COEY, JOHN; STAMENOV, PLAMEN
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Applied Physics Letters100
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Gold, Organic semiconductorsDOI:
http://dx.doi.org/10.1063/1.3701271Licences: