The above mentioned paper has finally shaped to its final form. White organic light-emitting diodes: Status and perspective has been published today in Reviews of Modern Physics (RMP). It contains more than 40 pages of densely packed details on white OLEDs including the main concepts of realizing white emission (from both polymers and/or small molecules), in depth discussions of respective efficiency limits, and promising strategies for enhanced light outcoupling. Here is an editorial summary (source RMP):
The conversion of electricity into a photon flux with color quality resembling natural sunlight is desirable for artificial illumination. The ubiquitous incandescent light bulb, introduced in 1880 by Thomas Edison, satisfies this color quality requirement but suffers from a rather poor energy conversion efficiency of approximately 5%. This review focuses on device strategies to produce efficient organic white light-emitting diodes based on small molecular and polymeric semiconductors, which in the context of next generation lighting have a considerable technological promise.
If you like it, please spread the word. Here is an exciting side note: This paper is published in the same issue of RMP that also contains the great Nobel lectures of Serge Haroche and David J. Wineland, who share the 2012 Nobel Prize for Physics. Another good reason to check out the current issue of RMP.