There are some companies out there still trying this.
As far regular type cells, this will burn them up quick. Along with the extra light comes extra heat. The you'll need active cooling and there goes the extra power.
IF you're talking about solar air or water heat, different animal. Do a search on helio-stats and such. THAT's where concentrators will really help.
IF you're really wanting to try this out, go grab a few older solar lawn lights and use the panels out of them. Do a quick measurement of the incoming juice before and after concentrating the light, then also if your meter has the ability, do the same thing for heat.
There is/was a type of setup out there that bounced the light to the panel instead of rotating the panel to the sun, and the discussion is on this forum somewhere.
Good luck and let us know how well you do.
Cheers
Bruce S