I think the news article exaggerates the purpose of the device described in the actual paper. It isn't intended as a competitor for opaque power generation cell

I think the news article exaggerates the purpose of the device described in the actual paper. It isn't intended as a competitor for opaque power generation cells. The idea is that, since you already need an anti-reflective coating to block IR light, it might as well be a coating that can scavenge a bit of the incident power instead of sending it all back into space.