Nanoparticle based spray on solar cells are cheap to make through new process 10/05/2013 - 00:00 Silicon-free solar cells, light and flexible enough to roll up or use as window blinds, are under development at a University of Alberta lab. The solar cells are made using nanoparticles — microscopic particles just 30 to 40 atoms across — that are very cheap to produce from zinc and phosphorus.
