Background
Type: Article

Photo-switching effect in stilbene organic field effect transistors

Journal: Journal of Applied Physics (10897550)Year: 7 March 2014Volume: 115Issue:
Karimi Alavijeh H.a Panahi F. Gharavi A.
BronzeDOI:10.1063/1.4864019Language: English

Abstract

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. © 2014 AIP Publishing LLC.