I don't know much about the physics, but it seems like you'd want square miles of solar panels, even in space, and then there's the problem of getting that energy back to earth. On the other hand, in space you'd get a lot of light frequencies that are rarer on Earth. It's not clear to me if those could be harnessed somehow. Regardless, it's a creative idea.

Ideas are great however even a small country like the Netherlands is looking at a trillion € bill to switch to 100% renewable by 2050.