| 摘要 |
<p>PURPOSE: A silicon collecting method from a used solar cell module is provided to increase productivity and to reduce costs required for producing solar cells by collecting and recycling expensive silicon. CONSTITUTION: A used solar cell module is immersed in organic solvent in order to collect solar cells based on the swelling phenomenon caused by ethylene vinyl acetate(EVA). Tempered glass separated from the solar cells is pre-collected. The solar cells attached to the swollen EVA undergo a pyrolyzing operation in the furnace at 500 to 700 degrees Celsius under an inert atmosphere, and the EVA is eliminated. Mixed acid solvent is prepared by mixing distilled water, nitric acid, fluoric acid, sulfuric acid, and acetic acid in order to eliminate an anti-reflective coating film and electrode materials from the cells. 5 to 25% of surfactant based on the total volume of the mixed acid solvent is added to the mixed acid solvent to obtain mixed solvent. The collected cells are immersed in the mixed solvent for 15 to 25 minutes to collect pure silicon.</p> |
