Advanced Materials

Organic Light-Emitting Transistors Based on Solution-Cast and Vacuum-Sublimed Films of a Rigid Core Thiophene Oligomer

Authors

  • F. Cicoira,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Via Gobetti 101, I-40129 Bologna, Italy
    2. Present address: INRS-EMT Université du Québec, 1650, Boulevard Lionel Boulet, Varennes, Québec J3X 152, Canada
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  • C. Santato,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Via Gobetti 101, I-40129 Bologna, Italy
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  • M. Melucci,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio della Sintesi Organica e la Fotoreattività (ISOF), Via Gobetti 101, I-40129 Bologna, Italy
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  • L. Favaretto,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio della Sintesi Organica e la Fotoreattività (ISOF), Via Gobetti 101, I-40129 Bologna, Italy
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  • M. Gazzano,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio della Sintesi Organica e la Fotoreattività (ISOF), Via Gobetti 101, I-40129 Bologna, Italy
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  • M. Muccini,

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Via Gobetti 101, I-40129 Bologna, Italy
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  • G. Barbarella

    1. Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio della Sintesi Organica e la Fotoreattività (ISOF), Via Gobetti 101, I-40129 Bologna, Italy
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  • We acknowledge P. L. Bellutti (IRST, Trento) for the supply of patterned substrates, P. Doppelt and A. Mantoux (CNRS, Vitry, France) for substrate silylation, A. Bonfiglio and P. Cosseddu (INFM-S3 Modena and University of Cagliari) for AFM imaging, S. Toffanin (CNR/ISMN) for LSCM imaging, R. Zamboni (CNR/ISMN) for fruitful discussions, and F. Rosei and F. Pietropaolo for critical reading of the manuscript. Funding from projects EU-NMP IP 500355 NAIMO and FIRB-RBNE033KMA is kindly acknowledged.

Abstract

A new organic multifunctional material, a rigid core thiophene oligomer, has been designed and synthesized. In both solution-processed and vacuum-sublimed films, the delicate balance of forces needed to obtain a supramolecular organization that imparts good charge transport and electroluminescence has been achieved, with the films being successfully employed as active layers in organic light-emitting (field-effect) transistors (see Figure).

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