https://blog.ucsusa.org/james-gignac/solar-panel-recycling
https://www.reuters.com/article/us-solar-recycling-idUSKBN1J...
https://www.pv-magazine.com/2020/08/26/recycling-pv-panels-w...
This is true of batteries too - basically, the stuff dead batteries are made of are far purer than ore, and pretty close to what functioning batteries need due to obvious reasons.