Photo-switching effect in stilbene organic field effect transistors

In this paper, we have investigated experimentally the photo-response of the organic field effect transistors (OFETs) based on π-conjugated stilbene oligomers with mutual optical and electrical properties. The cis-trans photoisomerization of these oligomers in the active layer of the OFETs disturbs...

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Veröffentlicht in:Journal of applied physics 2014-03, Vol.115 (9)
Hauptverfasser: Karimi-Alavijeh, Hamidreza, Panahi, Farhad, Gharavi, Alireza
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, we have investigated experimentally the photo-response of the organic field effect transistors (OFETs) based on π-conjugated stilbene oligomers with mutual optical and electrical properties. The cis-trans photoisomerization of these oligomers in the active layer of the OFETs disturbs the intermolecular interactions. This perturbation disrupts the charge transport in the conduction channel and turns-off the transistor. We used this phenomenon to modulate the drain current of the OFETs optically. The photo-response activity of the transistors is temperature dependent, in agreement with the isomerization of the stilbenes. Photoluminescent evaluations verify the isomerization of the oligomers in the thin film.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4864019