Thanks I didn’t understand that part.
I see, said the blind man, as he picked up his hammer and saw.
Now my question is this: though they claim great efficiency, there was a bit in there about ‘lower power’ photons ultimately hitting the photovoltaic cells... which sounds a lot like a loss of efficiency to me. Never mind that the cells themselves are still gonna be only ~30-40% efficient.
However, if they can redirect light to the edges... along with the associated heat... then there’s also a fair chance of making these windows much more thermally efficient - which would save power along with generating some.