Effects of two different solvents on Schottky barrier of organic device

In this paper, effects of two different solvents on Schottky barrier of ITO/ blend of methyl red dye – fullerene nanoparticles / Al - M electrode have been studied. We have taken chlorobenzene solvent and toluene solvent. Three different devices have been made by taking three different weight ratios of the dye – nanoparticles blend which are 1:1, 1:2 and 2:1. Estimation of interfacial Schottky barrier at junction of metal – organic dye is estimated using device's dark I – V plot. Interfacial Schottky barrier at metal – organic junction is least for 2:1 weight ratio of dye - nanoparticle blend in chlorobenzene solvent but for toluene solvent the Schottky barrier is least for 1:2 weight ratio of dye – nanoparticle blend. The lowering of barrier height at 2:1 and 1:2 ratios in Schottky barrier contacts prepared with chlorobenzene and toluene solvents can be attributed to the filling up of traps at the metal – organic layer interface. The Norde method is also used to check the consistency of the obtained value of Schottky barrier measured from I – V plots. Reduction in Schottky barrier results in improved current injection process at the metal – organic interface.