Organic light emitting diode simulation using Silvaco TCAD tools

Currently organic light emitting diodes (OLEDs) have become much popular in many spheres of microelectronics including optoelectronic applications, modulated light sources, internet connection etc. The research paper represents the results of two polymer layer organic light emitting diode (OLED) 1D and 2D-numerical simulation and analysis using Silvaco TCAD tools. The physically-based simulation of the electrical and optical characteristics, such as luminescence power, current density versus electric field, current density versus voltage and I-V characteristics for different thicknesses of emitting layer are presented. For better understanding the physical processes and operation principles of OLED the distribution of Langevin recombination inside the structure is also obtained and discussed. The comparisons between simulated and measured current-voltage device characteristics revealded very good agreement and proved the validity of the model. The model developed in this work will be useful in OLED design optimization and extraction the electrical parameters of device like threshold voltage and carriers mobility.