Right, the most exotic stuff in (some) solar cells is cadmium and tellurium. The cadmium is nasty but not hard to source, maybe 8 g/m^2. Perovskite cells use a

Right, the most exotic stuff in (some) solar cells is cadmium and tellurium. The cadmium is nasty but not hard to source, maybe 8 g/m^2. Perovskite cells use a thin film of mostly lead or tin, and maybe some bromine. They should be calling the neodymium and stuff sometimes used in wind turbines "lanthanides", instead, to avoid misleading people about their availability.