Modeling of performance characteristics of OLED

This report deals with modeling of performance characteristics of the organic light-emitting diodes (OLED) in the case of tunneling and thermionic injection into emitting layer. The performance characteristics include voltage dependence of current and quantum efficiency of the device. It is shown that the onset of the radiation of the OLED is determined by the unipolar injection of the charge carriers with lower barrier and the slow decrease of the device efficiency at large applied voltage is due to the electric field dependence of the mobility of charge carriers.