ITO is a new technology that makes it possible to conduct electricity on ultra thin surfaces.
With graphene it’s possible for us to place layer upon layer to create different transparencies and electricity levels generated from the sun. It’s an extremely thin layer and can I theory be applied to any surface and is able to generate a moderate to high amount of power from the sun. The only drawback is the visibility of the glass that it’s applied to, but this can also be a positive thing, in all the cases you have a dim window, there is no reason not to get some energy from it.