Sounds very cool. But why restrict it to windows? Seems any sunlit surface will do.
Good by another couple trillion dollars in tax money to pay for this. It can only provide a minuscule amount of electricity consumed in an office. We’re talking a few light bulbs. There is only so much you can harvest from sunlight. It doesn’t matter if you have 100% efficient solar collectors. The sun only puts out so much light and you can’t change that.
Like cold fusion, this technology will be commercially viable in no more than ten years for at least the next 25 years.