Well Once again I am far outside of my area of expertise. The hottest news in the "Green" push involving solar energy is the Solar Orb by Raw Lemon.
It is the claim of German architect André Broessel to be 70 percent more efficient than a typical solar panel.
You can also search rawlemon solar sphere for more info.
I know so little about this that you will need to read for yourself. My intent is to provide you with articles and sites to do your own evaluation.
Is this the future for solar energy?