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Solar Cells
Part 1 of Paper
....on solar cell was one of the first
types to be developed and it is still the most common type in use today. They do
not pollute the atmosphere and they leave behind no harmful waste products.
Photovoltaic cells work effectively even in cloudy weather and unlike solar
heaters, are more efficient at low temperatures. The.... Part 2 of Paper
.... can exist, between the inner valence
band and outer conduction band [Book 1]. Valence electrons help to bind together
the atoms in a solid by orbiting 2 adjacent nucleii, while conduction electrons,
being less closely bound to the nucleii, are free to move in response to an
applied voltage or electric field. The fewer conduction electrons there are, the
higher the electrical resistivity of the material.
In semiconductors, the materials from which solar sells are made, the
energy gap Eg is .... |
| Number of words: 1163 - Approximate pages: 5 |
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