German scientists develop 90lm/w OLED lighting panels

Physicists from the Technical University of Dresden, together with Novaled has developed a new white OLEDs with efficiency of 90lm/w. They have used a new emission layer design and improved light outcoupling concepts. In fact, with special 3D outcoupling measures, they have achieved 124 lm/W.

Both values were determined in an integrating sphere with blocked substrate edges, only taking the light into account that is emitted to the forward hemisphere, CIE color coordinates are (0.41/0.49). An in depth article is published in today’s highly esteemed research journal ‘nature’.

“The potential of the devices is obvious when one considers that even at the very high brightness of 5,000 cd/m² a power efficiency of 74 lm/W is obtained,” comments Prof. Karl Leo, Director of the Institute of Applied Photophysics (IAPP, TU Dresden). “Thus high-intensity illuminations at very high efficiencies are possible as well”.