Solar Energy (Photovolatics)
A novel chemical recycling method for Si-solar panel without the use of HF is proposed. The key component of recycling solar cells is the repurposing of the individual components of each cell. Silicon is recovered in a high enough purity to be reused in the production of new solar cells and the metallic components are to be sold off as commodities. Chemicals required for an etching process to remove metallic components include HCl and HNO3. The results show after one iteration that around 93.3% of Al and 61.5% of Ag was recovered for polycrystalline Si cell (p: Si) and 93.5% of Al and 61.3% of Ag was recovered for monocrystalline Si cell (m: Si). The experimentation method is scalable environmentally friendlier than a process involving HF.