What kind of solar were these? I read the first couple pages and my skim didn't find them. If they aren't perovskite (and probably can't be since those are oh-

What kind of solar were these? I read the first couple pages and my skim didn't find them. If they aren't perovskite (and probably can't be since those are oh-so-close but not being manufactured), that raises two exciting possiblities: 1) another jump when perovskit ~20% efficient cells are produced en masse 2) The hybrid perovskite + other types variants that give even better efficiency with mixed costs... As I understand it, the only challenge with perovskites now is that they break down in contact with humidity IIRC. Great for deserts though?