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Aenert.com - Photovoltaic solar cell design and and mode of operation. CC BY-SA 4.0 licence

1. Solar panels;  2. Inverter;  3. Electric box;  4. Home power;  5. Battery;  6. Utility grid;  7. Glass cover;  8. Anti-refl ective coating;  9. Front contact grid (negative electrode);  10. n-type semiconductor (silicon with phosphorus);  11. p-n junction;  12. p-type semiconductor (silicon with boron); 
13. Back contact (positive electrode);  14. Electrical circuit