Opaque solar panels could be turned into window glass for tall buildings by punching hundreds of tiny holes in them so our eyes perceive them as transparent
Source:
https://www.newscientist.com/article/2226881-punching-holes-in-solar-cells-turns-them-into-transparent-windows/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home