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Essay / Research Paper Abstract
This 4 page paper looks at photovoltaic cells for the generation of electricity. The paper starts by examining the way that solar cells operate, identifies viable environmental alternatives, looks at the net environmental cost and assesses the future market potential. The bibliography cites 4 sources.
Page Count:
4 pages (~225 words per page)
File: TS14_TEsolarcells.doc
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Unformatted sample text from the term paper:
new idea, the photoelectric effect on which the technology for photovoltaic is based was discovered in 1839 by Bequerel, however the first photovoltaic modules was not developed until 1954 by
Bell laboratories (Knier, 2011). The technology can since come a long way, but is based on the same principle where certain materials will generate electricity when exposed to light. The
photovoltaic cell1 will usually consist of a semi-conducting material, usually silicon manufactured so that half the cell (the top layer) has more elections than the other half, when sunlight hits
the material and the photons are absorbed it will create an electric field across the layers as electrons are only able to travel in one direction. The field strength will
reflect the strength of the sunlight, strong sun creates more electricity. The cells will be installed grouped together in modules, with the ability to wire numerous modules together, usually in
areas where there is a high level of sunlight. The cells may use single junction technology but there is a movement toward multi multi-junction technology (Knier, 2011).
Direct sunlight is not needed. The energy will then be either used directly or stored in a battery. Most system will see the installation of
flat cells in existing roofs, but they are being increasing installed in new builds with the development of tiles and panels that can be part of the construction. 2. Viable
Alternatives There are a number of viable green energy alternatives; these include wind power, hydroelectric and the. The way that these are used can vary depending on the context.
Wind turbines can be in a small or large scale, and can generate variable amounts of power,. These are turbines which are then connect to batteries. They can be used
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