Schottky energy barrier and charge injection in metal/copper–phthalocyanine/metal structures

We present experimental results on current injection from different metal electrodes into copper–phthalocyanine (Cu–Pc). The current–voltage (J–V) characteristics and current injected at the contact are investigated as a function of Schottky energy barrier, thickness of organic semiconductor, and temperature. These results are interpreted using a consistent description of J–V characteristics through the injection limited current in the case of high Schottky energy barriers and space charge limited current in the case of low Schottky energy barrier.