Light-emitting diodes based on organic materials (known as OLEDs) have a number of attractive qualities that could make them the light sources of choice for the future. Unfortunately until now they have never reached the power efficiencies of fluorescent tubes. Here, the engineering of white OLEDs with power efficiencies at least as high as that of standard fluorescent tubes brings the future a little closer.
- Sebastian Reineke
- Frank Lindner
- Karl Leo
