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Advanced Materials

High-Performance Single Crystal Organic Field-Effect Transistors Based on Two Dithiophene-Tetrathiafulvalene (DT-TTF) Polymorphs

Authors

  • Raphael Pfattner,

    1. Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain)
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  • Marta Mas-Torrent,

    Corresponding author
    1. Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain)
    • Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain).
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  • Ivano Bilotti,

    1. Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universitá di Bologna, 40136 Bologna (Italy)
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  • Aldo Brillante,

    1. Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR Bologna, Universitá di Bologna, 40136 Bologna (Italy)
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  • Silvia Milita,

    1. CNR- Instituto per la Microelettronica e Microsistemi (IMM), 40129 Bologna (Italy)
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  • Fabiola Liscio,

    1. CNR- Instituto per la Microelettronica e Microsistemi (IMM), 40129 Bologna (Italy)
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  • Fabio Biscarini,

    1. CNR- Instituto per lo Studio dei Materiali Nanostrutturati (ISMN), 40129 Bologna (Italy)
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  • Tomasz Marszalek,

    1. Department of Molecular Physics, Technical University of Lodz, 90–924 Lodz (Poland)
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  • Jacek Ulanski,

    1. Department of Molecular Physics, Technical University of Lodz, 90–924 Lodz (Poland)
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  • Andrzej Nosal,

    1. Institute of Mechanical Engineering, Technical University of Lodz, 90–924 Lodz (Poland)
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  • Maciej Gazicki-Lipman,

    1. Institute of Mechanical Engineering, Technical University of Lodz, 90–924 Lodz (Poland)
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  • Michael Leufgen,

    1. Universität Würzburg, Physikalisches Institut (EP3), Am Hubland, 97074 Würzburg (Germany)
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  • Georg Schmidt,

    1. Universität Würzburg, Physikalisches Institut (EP3), Am Hubland, 97074 Würzburg (Germany)
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  • Laurens W. Molenkamp,

    1. Universität Würzburg, Physikalisches Institut (EP3), Am Hubland, 97074 Würzburg (Germany)
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  • Vladimir Laukhin,

    1. Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain)
    2. Institució Catalana de Recerca i Estudis Avançats (ICREA), ICMAB-CSIC, 08193-Bellaterra (Spain)
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  • Jaume Veciana,

    1. Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain)
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  • Concepció Rovira

    Corresponding author
    1. Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain)
    • Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra (Spain), Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Bellaterra (Spain).
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Abstract

Solution prepared single crystal organic field-effect transistors (OFETs) combine low-cost with high performance due to structural ordering of molecules. However, in organic crystals polymorphism is a known phenomenon, which can have a crucial influence on charge transport. Here, the performance of solution-prepared single crystal OFETs based on two different polymorphs of dithiophene-tetrathiafulvalene, which were investigated by confocal Raman spectroscopy and X-ray diffraction, are reported. OFET devices prepared using different configurations show that both polymorphs exhibited excellent device performance, although the α-phase revealed charge carrier mobility between two and ten times higher in accordance to the closer stacking of the molecules.

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