Numerical model for organic light-emitting diodes

An extensive numerical model recently developed for the multilayer organic light-emitting diode is described and applied to a set of real devices. The model contains a detailed description of electrical contacts including dip olar layer formation, thermionic and tunneling injection, space charge effe cts, field dependent mobilities and recombination processes. The model is a pplied to simulate several single layer devices and the family of bilayer d evices made in our group. It provides insight into the energy level shifts, internal electric fields and charge distribution (and consequently recombi nation) throughout the device. Finally, the analysis is extended to the opt imization of bilayer device. (C) 2001 American Institute of Physics.