Comment Re:Would be better if the UV light was converted (Score 2) 30
You can use the UV light. You need different material with a different bandgap. Basically a whole other panel, stacked on the first. But before you go after that 5% UV you're going to want to go after the blue, and probably the red and some of the near IR.
They're called multijunction solar cells and they're used in places where you need maximum efficiency, like in space. For regular use, single junction cells are much more popular because a single bandgap panel absorbing at the maximum solar emission is going to be more efficient price-wise than a multijunction cell where the extra bandgaps are in lower emission ranges.