comparison of the electrical properties of clalpc and cupc thin film planar devices

in this research chloroaiminium and copper phthalocyanine(clalpc and cupc)were purified twice, using entrained sublimitation techniques. ohmic contacts were made on the samples using the electrical properties of both (clalpc and cupc) were studied over a range of temperatures. the activation energies of these materials were measured using both forward and reverse current-voltage characteristic and then they were carnpared. it was found that clalpc has a lower activation energy than cupc. further, i found that in clalpc, the activation energies evaluated using forward and reverse bias differ significantly at low temperatures while in cupc this did not occur.