The mentioned advantage seems dubious considering that the only cell type for which that is currently true is those using lead, for which the toxicity issue isn

The mentioned advantage seems dubious considering that the only cell type for which that is currently true is those using lead, for which the toxicity issue isn't solved. Trading the complexity of the cleanroom facility for the complexity of lead containment doesn't appear to be a good choice. The tin based cells might look interesting though. PS. OTOH I wasn't aware that Si based panels might have lead in them, too (even though much less?) as per https://news.ycombinator.com/item?id=32283432 https://news.ycombinator.com/item?id=32283432