Nano antennas array for improving the light emission rate of organic phosphorescence

TL;DR

This study demonstrates that nano antenna arrays made of Al and Au can enhance the light emission rate of organic phosphorescent materials in OLEDs, leading to increased efficiency and reduced exciton lifetime.

Contribution

The paper introduces a novel application of nano antenna arrays embedded in organic solutions to improve phosphorescence emission in OLEDs.

Findings

15% decrease in exciton lifetime

10% increase in photoluminescence

Enhanced OLED internal and extraction efficiency

Abstract

In this paper we present how nano antennas arrays based on Al and Au were successfully increased the phosphorescence emission rate of Iridium-polypyrrole (Irppy3) and Platinum-octaethyl-porphyrin (PtOEP) solutions - which are commonly used as the active layer in organic light emitting diode (OLED) devices. Using electron beam lithography, the nano antennas were embedded inside those organic solutions and lab measurements were conducted. The lifetime of the organic solutions excitons', was decreased by 15%, while the photoluminescence was improved by 10% due to the improvement of the OLED internal and extraction efficiency.