A solar cell is the basic element of solar photovoltaics. It is built out of semiconductor material, and usually its surface area is no greater than 10×10 cm. Its surface color is usually black or dark, for obvious reasons, that is, to reflect as little of the solar energy as possible. When exposed to...
Every solar cell is based on a very fundamental physical principle which involves interaction between light and electrons. The light (or photons – small packages of light energy) is of course coming from the Sun, and the electrons are present in the material out of which the solar cell is built. The photons come...
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