Experiments For Kids – Homemade Solar Cell
He had earlier been home experiments on solar energy solar cells where we needed it, here we show a way forward.
For those who are not very familiar with, a solar cell is a device that converts light energy from the sun into electrical energy. A photovoltaic solar panel is composed of an array of solar cells connected in series and / or parallel (usually uses arrays of 36 cells in series, but this depends on the manufacturer).
To make our cell work, we need a material that produces the photovoltaic effect, which generally is a semiconductor like silicon. In this case we use the cuprous oxide (Cu2O), which by their semiconductor materials as was used in the manufacture of diodes rather than silicon.
As mentioned, this solar cell is not going to serve to illuminate a house, but is an interesting project that can be done simply. This is because the material we use is the cuprous oxide and silicon or germanium is used in the manufacture of commercial cells and have greater efficiency.
The operation is simple, light energy given enough solar energy to the electrons in the outermost layer of oxide, so that they become free electrons. These pass through the salt water that is our electrolyte and reach the plate clean, returning through the cable to the motherboard burned. The larger the radiation increased number of free electrons and thus obtain the current will be higher.
Materials needed to made solar cell in your home:
* A sheet of copper (or so we use a sheet of 30 x 30 cm x 1 / 16 “to three pairs of cells 10 x 10 cm)
* An electric burner
* Cables with alligator clips or alligator.
* Plastic bottle (preferably one of a good diameter to prevent the plates in contact)
* Table salt
* Ammeter / Multimeter
Solar Cell Experiments For Kids Procedure:
First wash your hands so you transfer the cell fat when working. Then cut the cell so that the area of this, can be heated entirely by the burner you’re using (We work with cells 10 x 10 cm). C encourages the cell in the oven for half an hour. It is advisable to have washed the cell before, to avoid leaving traces of fat.
As the cell warms get a color like you see in the picture above. After a period of time, will form a black layer which is cuprous oxide. We must ensure that it forms a good layer of rust, to work (half hour of heating is sufficient).
Now let the plate to cool for 20 minutes. You’ll notice that you have formed separate scales tapping the plate. Do not wipe the plate completely or it will ruin the experiment.
Finally, cut a board the same size as the previous one. Assemble the following assembly connects each plate with a crocodile, a container filled with salt water (best if this is pre-heated) and place the plates looking at each other, trying to avoid coming into contact.
You should check with the multimeter, without burning the plate is the positive pole and burned the negative. The current depends on the area of the plate and solar radiation at the time. You can do combinations of this cell, in series or parallel for higher voltages or currents.