Featured Technologies
Organic Light-emitting Diode (oled) With Resonant Structure
ID U-4660
Category Hardware, Circuits, & Sensors
Subcategory Semiconductors
Researchers
Brief Summary
Directive optical device that integrates a patch grating resonator within an organic LED structure.
Problem Statement
Existing light emitting devices suffer from efficiency problems, such as incomplete light extraction from active layers. This inability to direct light from the diode results in an 180deg active range of light emission and power losses.
Technology Description
The OLED with Resonant Structure utilizes two mirrors to increase the radiative efficiency of OLEDs by 80-100 percent. The first mirror is a partially reflective, metallic patch grating resonator that reduces lateral propagation of radiative emissions’ diffusion. The second mirror is a transparent electrode of the OLED, which communicates with the optically active material. Together, these mirrors almost double the output power of the LED.
Stage of Development
Benchtop Prototype
Benefit
- Focuses light emissions to increase radiative efficiency by 80-100 percent.
- Increases power output of the LED by 2x.
- Improves directionality of emitted light.
- Applicable to flexible displays.
Publications
McDaniel, S., Blair, S. (2010). Increased OLED radiative efficiency using a directive optical antenna. Optics Express. 18(16):17477. doi:10.1364/oe.18.017477
IP
Publication Number: US-2013-0170219-A1
Patent Title: Directive Optical Device Having a Partially Reflective Grating
Jurisdiction/Country: United States
Application Type: Non-Provisional
Contact Info
Dean Gallagher
(801) 585-0396
dean.gallagher@utah.edu
