An all C60 vertical transistor for high frequency and high current density applications

We present a vertical organic transistor with high operating frequencies and high current densities based on the organic semiconductor C-60. In this vertical organic triode (VOT), doped layers can easily be inserted to efficiently reduce the contact resistance without the need for additional structuring. Combined with annealing at elevated temperatures (150 degrees C for 2 h), we achieve a current density of 1A/cm(2) at a driving voltage of 3V together with an extremely high transconductance of 30 mS. The transistor retains a voltage gain above 1 up to 1.5 MHz in a simple inverter circuit. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767391]