Abstract
A Schottky type diode has been constructed with the electrochemically prepared copolymer having pyrrole and N-methylpyrrole units and a low work function metal (In). The heat treatment of the copolymer in air was performed in order to stabilize the electrical characteristics of the device before the deposition of a blocking electrode. The electrical properties have been investigated by means of I–V and C–V measurements. The diode quality factor and the barrier height have been obtained to be n=1.2 and ψb=0.81 V by applying a thermionic emission theory, respectively. At high current densities in the forward direction, a space-charge-limited current has been observed. This observation would be due to the charge-injection across the thin oxidized layer which would be formed during the heat treatment of the copolymer in air. Other junction parameters have been also determined by means of C–V measurements.
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