Conduction processes in tin- and silicon-phthalocyanine thin films

Electronic conduction studies have been carried out on evaporated tin- and silicon-phthalocyanine thin films. The samples showed carrier excitation via a field-lowering mechanism with a logJα˙V1/2 plot and the current density-voltage (J–V) characteristics were studied. Both polarities showed two characteristic regions in the J–V plots at low and high voltages respectively leading to the conclusion that electrical conduction proceeds via Schottky and Poole–Frenkel emission.