High Light Extraction on OLED with Microcavity Effects

Introduction

OLEDs have been researched for application in display devices due to their considerable advantages. In order to further improve and optimize devices for practical applications, the electrical and optical parts have to be considered.
In this article, we show that the optical properties include the excitation distribution of the microcavity device consisting of two organic layers with varying thickness of NPB and Alq3. As the optimal thickness of the organic layers is in the order of a wavelength, A standing wave pattern is observed. To investigate the effects of organic layer thickness, it is necessary to combine electrical and optical models together for the most critical parameters for the light generation.