TEMPERATURE-DEPENDENT TUNNELING CURRENT AT METAL POLYMER INTERFACES -POTENTIAL BARRIER HEIGHT DETERMINATION/

It has been demonstrated that the expression for the temperature depen dent tunneling current through a triangular potential barrier at metal /polymer interfaces fits experimental data including the deviation fro m a straight line observed in Fowler-Nordheim plots. The fitting param eters can be used to calculate the potential barrier height at the met al/polymer interface, which is of crucial importance for the control o f charge injection in organic light emitting diodes. The tunneling cur rent density expression reproduces the observed dependence of the curr ent with temperature. (C) 1997 American Institute of Physics.