This is a novel idea (as they note, transparent + power generation seem oxymoronic), but my impression is not tha we're hard-pressed for available surfaces for

This is a novel idea (as they note, transparent + power generation seem oxymoronic), but my impression is not tha we're hard-pressed for available surfaces for small-scale photovoltaic installations. Walls of my house. Roof of my house. The issue is cost of producting, installing, and maintaining a small-scale installation v. the output. I don't know. Maybe giant glass skyscrapers will find this of value--blocking UV is a desirable side-effect as well. But predictions of "maybe as high as 5% efficiency" make me skeptical of it being particularly revolutionary.