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Surfactant-free CO2-based microemulsion-like systems

Surfactant-free CO2-based microemulsion-like systems

                                                         Robert F. Hankel, Paula E. Rojas, Mary Cano-Sarabia, Santi Sala, Jaume Veciana, Andreas Braeuer* and Nora Ventosa* Chem. Commun., 2014,50, 8215-8218

Organic metal–organic semiconductor blended contacts in single crystal field-effect transistors

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Raphael Pfattner ,  Marta Mas-Torrent ,  César Moreno ,  Joaquim Puigdollers ,  Ramón Alcubilla ,  Ivano Bilotti ,  Elisabetta Venuti ,  Aldo Brillante ,  Vladimir Laukhin ,  Jaume Veciana and Concepció Rovira;
J. Mater. Chem., 2012, Advance Article


DOI: 10.1039/C2JM32925E

A novel approach to blend organic source and drain electrodes with semiconducting organic single crystals in field-effect transistors is described. The devices fabricated show a very high performance which is ascribed to a notable reduction of the contact resistance as measured by Kelvin probe microscopy. The average mobility is found to be four-fold that obtained from devices where no interpenetration of the two materials takes place. This work highlights therefore the importance of the contacts in organic field-effect transistors not only in terms of the alignment of the energy levels but also with respect to the interface morphology.

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