Ambipolar Cu- and Fe-Phthalocyanine single-crystal field-effect transistors

Details Ambipolar Cu- and Fe-Phthalocyanine single-crystal field-effect transistors Ambipolar Cu- and Fe-Phthalocyanine single-crystal field-effect transistors

2005-03-11

arxiv.org/abs/cond-mat/0503282v1

Physics

Condensed Matter

Other Condensed Matter

Submitted to APL

Scientific paper

10.1063/1.1984093

We report the observation of ambipolar transport in field-effect transistors fabricated on single crystals of Copper- and Iron-Phthalocyanine, using gold as a high work-function metal for the fabrication of source and drain electrodes. In these devices, the room-temperature mobility of holes reaches 0.3 cm$^2$/Vs in both materials. The highest mobility for electrons is observed for Iron-Phthalocyanines and is approximately one order of magnitude lower. Our measurements indicate that these values are limited by extrinsic contact effects due to the transistor fabrication and suggest that considerably higher values for the electron and hole mobility can be achieved in these materials.

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