Finite difference modeling of bipolar OLED

Simulation of Organic Light Emitting Diodes (OLEDs) can be helpful for improving the performance and optimization of the device. In this study Finite Difference (FD) method was employed for the discretization of the governing equations, i.e., continuity, drift-diffusion and Poisson´s equations. Hole and electron mobilities were considered to be electric field dependent of Poole-Frenkel form and electron-hole recombination of a Langevin type. The results of this paper give a detailed knowledge about the operation mechanism of OLEDs, charge, field and exciton formation distributions. Also the effects of various parameters changes in OLED response were analyzed.