It's reported that one of the greatest obstacles to increased adoption of OLED lighting is that current technology. The usual OLED lighting emits only 20 percent of the light generated, and the rest remains trapped inside the device, wasted.
Recently a joint research project by the University of Michigan and Princeton University has devised a new OLED technology which would induce the release of 60 percent more light. The new OLED light can reportedly produce a brightness of 70 lumens per watt, whereas incandescent lights can emit 15 lumens per watt. Fluorescent lighting still remains the most efficient though, capable of producing 90 lumens per watt. The inefficiency of OLED light is due to the fact that OLEDs create light by beaming electrons to an organic material that's 1 nanometer in thickness. The light created is reflected internally and is parallel to the grid strands, making it difficult for the light to be emitted perpendicularly too.
