Current modulation of a hygroscopic insulator organic field-effect transistor

Bäcklund, T. G.; Sandberg, H. G. O.; Österbacka, R.; Stubb, H.
October 2004
Applied Physics Letters;10/25/2004, Vol. 85 Issue 17, p3887
Academic Journal
We have fabricated solution processable polymer transistors with high conductivity, requiring only a few volts for obtaining good current modulation. The devices can be fabricated and operated in air and the operation is greatly enhanced in humid atmosphere. Devices reach an On/Off ratio of about 600 and a subthreshold swing of 500 mV per decade operating on voltages less than 2 V. In this letter the mechanism behind the current modulation is investigated, and we show that the current is modulated through ion-assisted oxidation and reduction of the semiconductor by ions moving vertically in the insulator material to the transistor channel.


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