Doping polymers with nanoparticles increases the efficiency of OLED by 30%

One of the important parameters of the OLED display for mobile devices is the brightness of the glow, calculated on the cost of energy. It is clear that the brighter the screen and the less it consumes energy, the steeper. Therefore, developments in the direction of improving the indicator of efficiency of organic LEDs are no less intensive than, say, in the area of ​​improving the quality of the image displayed by the display. Recently, scientists at the Oak Ridge National Laboratory (Oak Ridge National Laboratory) in the United States presented a technology capable of increasing the efficiency of OLED by more than 30%. Thanks once again say nanoparticles. Well, savvy researchers, of course.

Conventional OLEDs are non-magnetic in nature and are used to produce photon radiation, using an electric field. Researchers from Oak Ridge went a little further and added magnetic cobalt and iron nanoparticles to the polymer matrix (at a concentration of no more than 0.1%). In other words, they simply doped materials for organic LEDs with magnetic nanoparticles. This approach was able to provide a 27% increase in efficiency, and the application of an external magnetic field to organic LEDs added another 5%. Thus, the total increase in efficiency was 32% compared with conventional OLEDs.

Scientists are not going to stop at what they have achieved. They plan to conduct experiments with the amount of impurities and methods of mixing nanoparticles and polymers. With this they are trying to achieve the most homogeneous mixture, which will allow to improve the achieved result to some extent.

via IXBT