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High-Performance Low Voltage Organic Thin-Film Transistors

Published online by Cambridge University Press:  01 February 2011

Stijn De Vusser
also with KULeuven, ESAT-INSYS, Kasteelpark Arenberg 10, B-3001 Leuven, Belgium
Soeren Steudel
also with KULeuven, ESAT-INSYS, Kasteelpark Arenberg 10, B-3001 Leuven, Belgium
Kris Myny
MEC vzw, Kapeldreef 75, B-3001 Leuven, Belgium
Jan Genoe
MEC vzw, Kapeldreef 75, B-3001 Leuven, Belgium
Paul Heremans
also with KULeuven, ESAT-INSYS, Kasteelpark Arenberg 10, B-3001 Leuven, Belgium
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In this work, we report on high-performance low voltage pentacene Organic Thin-Film Transistors (OTFT's) and circuits. Inverters and ring oscillators have been designed and fabricated. At 15 V supply voltage, we have observed invertors showing a voltage gain of 9 and an output swing of more than 13 V. As for the ring oscillators, oscillations started at supply voltages as low as 8.5 V. At a supply voltage of only 15 V, a stage delay time of 3.3 νs is calculated from experimental results.

We believe that these results show for the first time a high speed ring oscillator at relatively low supply voltages. The required supply voltages can be obtained by rectification using an organic (pentacene) diode. These results may have an important impact on the realization of RF-ID tags: by integrating our circuits with an organic diode, the fabrication of organic RF-ID tags comes closer.

Research Article
Copyright © Materials Research Society 2005

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