Universal Display today announced that it has been awarded a $99,919 Small Business Innovation Research (SBIR) Phase I grant from the U.S. Department of Energy (DOE) under the Department's Solid State Lighting program.
The program, titled 'Enhanced Light Outcoupling in WOLEDs', will focus on demonstrating a novel technique to improve the optical outcoupling efficiency of a white OLED. Through the use of this novel technique, Universal Display intends to double the outcoupling efficiency, resulting in an external quantum efficiency of about 50%.
Using the Company's high-efficiency UniversalPHOLED(TM) technology, white OLEDs can achieve up to a 100% internal quantum efficiency - meaning that all of the electrical energy can be converted into light. Typically, only 20% of that light is directed through the front surface as useful light; however, an external component is often added to OLED panels to collect and emit more light. By comparison, the novel approach proposed for this project involves integrating an outcoupling enhancement directly within the layers of the OLED device. This approach has the potential to double the light output, while preserving the OLED's thin form factor, and may also be significantly more cost effective to manufacture. Such improvements are important for white OLEDs to achieve the DOE's targets of 150 lumens per watt (lm/W) with a cost of less than $50/Kilolumen.