Bis(arylene-ethynylene)-s-tetrazines: A Promising Family of n-Type Organic Semiconductors?

Mónica Moral, Andrés Garzón, Yoann Olivier, Luca Muccioli, Juan Carlos Sancho-García, José M. Granadino-Roldán, Manuel Fernández-Gómez

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

We theoretically describe in this work the n-type semiconducting behavior of a set of bis(arylene-ethynylene)-s-tetrazines ((ArCC)2Tz), by comparing their electronic properties with those of their parent diaryl-s-tetrazines (Ar2Tz) after the introduction of ethynylene bridges. The significantly reduced internal reorganization energy for electron transfer is ascribed to an extended delocalization of the LUMO for (ArCC)2Tz as opposite to that for Ar2Tz, which was described mostly localized on the s-tetrazine ring. The largest electronic coupling and the corresponding electron transfer rates found for bis(phenyl-ethynylene)-s-tetrazine, as well as for some halogenated derivatives, are comparable to those reported for the best performing n-type organic semiconductor materials such as diimides and perylenes. The theoretical mobilities for the studied compounds turn out to be in the range 0.3-1.3 cm2 V-1 s-1, close to values experimentally determined for common n-type organic semiconductors used in real devices. In addition, ohmic contacts can be expected when these compounds are coupled to metallic cathodes such as Na, Ca, and Sm. For these reasons, the future application of semiconducting bis(phenyl-ethynylene)-s-tetrazine and its fluorinated and brominated derivatives in optoelectronic devices is envisioned.

langue originaleAnglais
Pages (de - à)18945-18955
Nombre de pages11
journalJournal of Physical Chemistry C
Volume119
Numéro de publication33
Les DOIs
Etat de la publicationPublié - 20 août 2015
Modification externeOui

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