We clearly need a huge PRISM or a diffraction grating, placed on a tall tower that moves on railroad tracks so that it's always between the sun and the solar cell field. Then we can tune the cells to the right bands and use steam on the low frequency end.

You could also just cool the cells and try to use the waste heat.

Actually in space you could have these gossamer structures more easily as there is more ...space, and the weight penalty is less. I know some satellites use primitive concentration methods coupled with very high efficiency cells to generate a lot of power.