This is vaporware. I've been hearing about this sort of technology for the last 20 years. Hope to be proven wrong someday.

Here's a similar article from 2013, talking about a paper from 2005:

https://www.fastcompany.com/1681384/you-may-soon-just-spray-...

"Some day, homeowners eager to produce their own energy might not line their roofs with solar panels. Instead, they’ll spray-paint them with a mist full of electricity-generating solar cells."