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Electronic properties of polypyrrole polyindene composite metal junctions

Bozkurt, A
Ercelebi, C
Toppare, Levent Kamil
Junction properties between conducting polymer composites of polypyrrole/polyindene (PPy/PIn) with different conductivities and metals like Pt, Au, Al and In have been investigated. Rectifying junctions were observed for low work function metals, In and Al; however, high work function metals, Pt and Au, were observed to form ohmic contacts to PPy/PIn composite in the sandwich geometry. The rectifying behavior of the metal/composite/Pt junctions improved when the conductivity of the composite was decreased from I to 0.01 S/cm. Using the ideal Schottky theory various junction parameters have been determined. Ail planar junctions were ohmic regardless of the conductivities of the samples.