A small, carefully made solar cell of approximately 2 1/2"
diameter will produce around 5 milliamperes of current in direct
sunlight. This is enough to drive a sensitive light meter or
extremely sensitive relay. Banks of these cells have even been
used to run small electric motors.
Experiment with the procedures described. You may stumble
onto a method of producing even more efficient cells than we have.
Just be sure to be very careful. The chemicals described can be
dangerous if abused or mishandled. You build at your own risk!
There are an estimated 80 trillion kilowatts of solar electrical
energy available in the northern hemisphere.
Many Different types of Chemicals Have Photoelectric Properties!
There are a number of elements and chemical compounds
that can be used to produce photoelectric power. They include
titanium, selenium, thorium, cuprous oxide, and metals of the
alkali group including sodium, potassium, rubidium, lithium,
cesium and francium.
The two best substances for a homemade cells are, selenium
and cuprous oxide.
Sunday, January 3, 2010
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