Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3449558
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Funding
- FCT
- MEXT [20740213]
- NEDO
- MaNEP
- Grants-in-Aid for Scientific Research [20740213] Funding Source: KAKEN
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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. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3449558]
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