Cobalt phthalocyanine-based submicrometric field-effect transistors.

Golmar, Federico; Stoliar, Pablo; Monton, Carlos; Valmianski, Ilya; Schuller, Ivan K.; Hueso, Luis E.; Casanova, Fèlix

We present performance characteristics of nanoscaled cobalt phthalocyanine (CoPc)-based organic field-effect transistors (OFETs) as a function of channel length. We found a channel length range which maximizes the field effect mobility in a trade-off between the decrease in the number of organic grain boundaries and the increase of the electrode-organic contact region. Further reduction of channel length is limited by fringe currents, which lead to an increased off current and to a degradation of the sub-threshold slope. From this, we define an optimal channel length of 280 nm to 1 μm for applications in submicrometric CoPc-based OFETs. Our results are particularly relevant for the miniaturization of chemical sensing OFETs, where metal phthalocyanines have proven to be excellent candidates for the fabrication of the transistor channel.

COBALT; PHTHALOCYANINES; ELECTRODES; TRANSITION metals; MATERIALS science

Physica Status Solidi. A: Applications & Materials Science, 2015, Vol 212, Issue 3, p607

1862-6300

Academic Journal

10.1002/pssa.201431409