The DoE in the US has come up with a funding program to companies working on improving SSL efficiency. The program is for some very specific advances identified by the DoE.
* Internal Quantum Efficiency (IQE)
* Reliability and Defect Physics for Improved Emitter Lifetime and Efficiency
* Phosphors and Conversion Materials
* Extraction Efficiency
* Organic Light Emitter Research
* Strategies for Improved Light Extraction of OLEDs
More details can be had here.