Abstract
The d.c. electrical conductivity of polycrystalline coronene layers was investigated. The shape of the current-voltage curves indicates that, in the layers investigated, the space-charge-limited currents are observed. From these characteristics three discrete trap levels in the coronene layers were found: 0.67, 0.72 and 0.81 eV. The total density of localized states is of the order of 10 16 cm −3.
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