Cadmium is only required in cadmium telluride solar panels, which have less than 5% global market share. Lead solder is still common in crystalline silicon pane

Cadmium is only required in cadmium telluride solar panels, which have less than 5% global market share. Lead solder is still common in crystalline silicon panels, though not universal; modules built with heterojunction cells typically avoid solder because the cells can't tolerate temperatures that high: https://onlinelibrary.wiley.com/doi/full/10.1002/pip.3688 https://onlinelibrary.wiley.com/doi/full/10.1002/pip.3688