How to make solar cells in a scientific way?
Follow the scientific instructions, then you will learn how to make it.
After you collect all the stuff you need, you should follow steps like this: 1.Cut the copper sheeting 2. After cleaning the copper, you can start to burn it. 3. Place the copper in a jar after it is washed carefully. 4.Before you put salt into it, you should also connect the alligator clips. 5. Put it under the sun and you can get your solar cells working.
As far as I can remember, you do need some salt for making solar cells.
You can ask your teacher and let him show you how to do it.
You can make it but you won't get too much energy out of that.