Comment by metalman

pervoskite, is a fancy way of not saying lead, and lead will oxidise, into crusty stuff, that is not nice for most life forms. So the challeng is to encapsulate the lead based photo voltaic material for 20 + years. It has to be perfect, which is very very difficult to do, and as far as I know, has never been achived in the format that will be needed for large scale deployment. I personaly live off grid (15+ years) and would welcome an even better type of pannel, but getting these perovskite pannels past the remaining hurdles......in a truely price competitive format...is not a solved problem the test will be, a new sealing method that is so good, and so cheap, that it takes over all similar sealing dutys, like windows, world wide.