According to this: http://www.solarpoweristhefuture.com/what-light-wave-do-solar-panels-use.shtml http://www.solarpoweristhefuture.com/what-light-wave-do-sola..

According to this: http://www.solarpoweristhefuture.com/what-light-wave-do-solar-panels-use.shtml http://www.solarpoweristhefuture.com/what-light-wave-do-sola... "Solar cells are made out of N-type and P-type semiconductor material that use the visual light spectrum to generate electricity. Solar radiation with wavelengths of 380 nm to 750 nm (violet to red) strike the material with enough energy to knock electrons from their weak bonds and create an electric current. The unused wavelengths (ultraviolet & infrared) do not have enough energy to dislodge the electrons and are absorbed as heat." So, I think this idea is pretty feasible if there is some sort of IR and UV filter that could reflect the IR and UV wavelengths at the heat collection tower and let the visible light into the PV cell to have multiple electricity generation sources. I would imagine doing that would more efficiently make use of all the light energy collected, rather than only the wavelengths that can transform the light energy into heat. I don't know if something like that exists... I know there are UV and IR filters for cameras but I am not sure if by filter they reflect the IR and UV light and let only the visible spectrum through.