For the process, solar cell fragments are separated and collected from by-products of the mechanical recycling process, which is already established. At Fraunhofer CSP, the cell fragments with sizes from 0.1 to 1 millimeter are first freed from the glass and plastic by various sorting processes. This is followed by the step-by-step removal of the backside contact, the silver contacts, the anti-reflective layer and finally the emitter by wet chemical etching. The silicon cleaned in this way is processed into monocrystalline or quasi-monocrystalline ingots in standard processes and then into wafers.
機械的再生プロセスの副産物からセル破片が分離される
https://www.ise.fraunhofer.de/content/dam/ise/en/documents/press-releases/2022/0122_ISE_e_PR_PERC-Solar-Cells%20from-Recycled-Silicon.pdf
