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Make a solar cell

Make a solar cell

A solar cell is a device for converting energy from the sun into electricity. The high-efficiency solar cells are made from highly processed silicon, and require huge factories, high temperatures, vacuum equipment, and lots of money.This solar cell is made from cuprous oxide instead of silicon. Cuprous oxide is one of the first materials known to display the photoelectric effect, in which light causes electricity to flow in a material.
The solar cell is made from these materials:

A sheet of copper flashing from the hardware store. This normally costs about $5.00 per square foot. We will need about half a square foot.
Two alligator clip leads.
A sensitive micro-ammeter that can read currents between 10 and 50 microamperes.
An electric stove. Table salt. We will want a couple tablespoons of salt.
Tap water.
Sand paper or a wire brush on an electric drill.
Sheet metal shears for cutting the copper sheet

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