NABOK, A. V., MASSEY, J., BUTTLE, S. and RAY, A. (2004). Study of electron tunnelling through thin polymer films using a mercury probe technique. IEE Proceedings. Circuits, Devices and Systems, 151 (5), 461-465.Full text not available from this repository.
A non-destructive technique employing a mercury probe as a counter electrode was successfully developed in order to study the mechanism of charge transport through thin polymer films on silicon and aluminum substrates. The polyelectrolyte self-assembly technique was employed to form the organic films. Both DC and AC current-voltage characteristics were measured at room temperature. An exponential dependence of the tunnelling current on the film thickness was found, and a tunnelling coefficient of 3.3 x 10(-9) m(-1) was calculated. The observed voltage dependence was interpreted in terms of the model of a trapezoidal-triangular barrier. The peak in current-voltage characteristics of polymer films on aluminum substrates may be attributed to resonance tunnelling via surface states on the alumina/polymer film interface.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group|
|Depositing User:||Ann Betterton|
|Date Deposited:||01 Apr 2010 16:41|
|Last Modified:||03 Jun 2010 15:05|
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