Small gap semiconducting organic charge-transfer interfaces

M. Nakano, H. Alves, A. S. Molinari, S. Ono, N. Minder, A. F. Morpurgo

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number232102
JournalApplied Physics Letters
Volume96
Issue number23
DOIs
Publication statusPublished - 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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