کنفرانس مهندسی برق ایران

صفحه اصلی / سی و سومین کنفرانس بین المللی مهندسی برق

Simulation Analysis of Electrode Metal Influence on the Microcavity Effect in Organic Light-Emitting Diodes

نویسندگان :

Faezeh Rahimi¹ Mohammad Sedghi² Asghar Gholami³

1- Isfahan University of Technology 2- Isfahan University of Technology 3- Isfahan University of Technology

کلمات کلیدی :

OLED،Fabry-Pérot،microcavity effect

چکیده :

Considering the development of nanotechnology and organic electronics, organic light-emitting diodes (OLEDs) have taken center attention as a promising light source in recent years. However, due to the Fabry-Pérot cavity effect, there is an inherent trade-off between the external quantum efficiency and the spectral linewidth of OLEDs. The cathode material plays a significant role in formation of a microcavity in OLEDs due to its distinct absorption and reflection coefficients, which in turn, substantially influence the device's performance. In this work, three two-dimensional OLED structures with Aluminum, Chromium and Copper were simulated using the finite-difference frequency-domain method with the COMSOL Multiphysics wave optics module. To reduce memory usage and simulation time, an interface between COMSOL and MATLAB was utilized. Subsequently, the far-field pattern of the device was calculated using the Fourier transform method. The results demonstrated that the device with an aluminum cathode showed superior performance compared to the others, achieving a full width at half maximum of 23 nm and a finesse factor of 4.7, respectively.