Micro-Cavity Nano-Layered Organic Light Emitting Diode to Improve Light Extraction and Electrical Properties of the Device

This paper presents the optimization of metallic layer thickness sandwiched between ITO layers to enhance the optical and electrical properties of the device. This is called as insertion of micro-cavity effect in the device with the help of Indium-Metal-Indium (IMI) layer. Four structures have been simulated with the difference in the thickness of metal layer. Silver (Ag) is used here as metal layer since it is the best choice to use as a metal in the IMI. It has been observed that IMI structure with 20 nm Ag thickness has achieved maximum current density as compared to other devices with different Ag values. There is an estimated enhancement of 40% in J-V characteristics in the bottom emitting OLED with aforementioned thickness. Current density achieved from the simulation is 0.9 A/cm
²
. An electroluminescence (EL) intensity spectrum is shown. It shows an EL intensity peak at 450 nm.