Electrical Properties of Junctions between Aluminum and Poly [3-(2'-PentyloxY-5'-(1'''-OxooctyL) Phenyl)Thiophene]
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Date
2003-06
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Addis Ababa University
Abstract
This thesis is based on the study of the electronic properties of Junction between Al and
poly[3-(2'-pentyloxy-5'-(1'''-oxoocty)phenyl)thiophene in the form of Al/poly[3-(2'-pentyloxy-
5'-(1'''-oxoocty)phenyl)thiophene]/ITO sandwich structure. The junction between aluminium
contacts to poly[3-(2'-pentyloxy-5'-(1'''-oxoocty)phenyl]thiophene films was studied using
current-voltage, capacitance-voltage and complex impedance spectroscopy techniques. The
current density-voltage curve is asymmetric and non-ohmic and shows Schottky barrier type
rectification. The complex impedance spectra are semi-circles that show the existence of a
region depleted of mobile charge carriers. An equivalent circuit consisting of one parallel RC
circuit is envisaged as a model of the interface
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Electrical Properties of Junctions between Aluminum