Correlation between crystal structure and mobility in organic field-effect transistors based on single crystals of tetrathiafulvalene derivatives

Marta Mas-Torrent, Peter Hadley, Stefan T. Bromley, Xavi Ribas, Judit Tarrés, Montserrat Mas, Elies Molins, Jaume Veciana, Concepció Rovira

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Abstract

Recently, it was reported that crystals of the organic material dithiophene-tetrathiafulvalene (DT-TTF) have a high field-effect charge carrier mobility of 1.4 cm2/(V-s). These crystals were formed by a simple drop-casting method, making this material interesting to investigate for possible applications in low-cost electronics. Here, organic single-crystal field-effect transistors based on materials related to DT-TTF are presented and a clear correlation between the crystal structure and the electrical characteristics is observed. The observed relationship between the mobilities in the different crystal structures is strongly corroborated by calculations of both the molecular reorganization energies and the maximum intermolecular transfer integrals. The most suitable materials described here exhibit mobilities that are among the highest reported for organic field-effect transistors and that are the highest reported for solution-processed materials.

Original languageEnglish
Pages (from-to)8546-8553
Number of pages8
JournalJournal of the American Chemical Society
Volume126
Issue number27
DOIs
Publication statusPublished - 14 Jul 2004
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)

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