Scientific article
Open access

Small gap semiconducting organic charge-transfer interfaces

Published inApplied physics letters, vol. 96, no. 23, 232102
Publication date2010

We investigated transport properties of organic heterointerfaces formed by single-crystals of two organic donor-acceptor molecules, tetramethyltetraselenafulvalene and 7,7,8,8-tetracyanoquinodimethane (TCNQ). Whereas the individual crystals have unmeasurably high resistance, the interface exhibits a resistivity of few tens of megohm with a temperature dependence characteristic of a small gap semiconductor. We analyze the transport properties based on a simple band diagram that naturally accounts for our observations in terms of charge transfer between two crystals. Together with the recently discovered tetrathiafulvalene–TCNQ interfaces, these results indicate that single-crystal organic heterostructures create functional electronic systems with properties relevant to both fundamental and applied fields.

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NAKANO, Masaki et al. Small gap semiconducting organic charge-transfer interfaces. In: Applied physics letters, 2010, vol. 96, n° 23, p. 232102. doi: 10.1063/1.3449558
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Article (Published version)
ISSN of the journal0003-6951

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