Crystal structures and transistor properties of phenyl-substituted tetrathiafulvalene derivatives

The crystal structures, thin-film properties, and field-effect transistor (FET) characteristics of tetrathiafulvalene (TTF) derivatives with two phenyl groups are systematically investigated. The highest mobility, 0.11 cm(2) V(-1) s(-1), is observed in biphenyl-substituted TTF (1). The correlation b...

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Bibliographic Details
Published in:Nanotechnology 2007-10, Vol.18 (42), p.424009-424009 (10)
Main Authors: Noda, B, Wada, H, Shibata, K, Yoshino, T, Katsuhara, M, Aoyagi, I, Mori, T, Taguchi, T, Kambayashi, T, Ishikawa, K, Takezoe, H
Format: Article
Language:English
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Summary:The crystal structures, thin-film properties, and field-effect transistor (FET) characteristics of tetrathiafulvalene (TTF) derivatives with two phenyl groups are systematically investigated. The highest mobility, 0.11 cm(2) V(-1) s(-1), is observed in biphenyl-substituted TTF (1). The correlation between the crystal structures and the FET properties demonstrates that good transistor properties are associated with two-dimensional intermolecular interaction, which is achieved when the molecules are standing nearly perpendicular to the substrate. Since these TTF derivatives are strong electron donors, the use of a metallic charge-transfer salt (TTF)(TCNQ) as the source and drain electrodes has resulted in a considerable reduction of the off current (TCNQ: tetracyanoquinodimethane).
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/18/42/424009