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A 4 page research paper that discusses the similarities and differences between solar cells and plant cells, that is, the process of photosynthesis. Bibliography lists 4 sources.
Page Count:
4 pages (~225 words per page)
File: KL9_khsolplace.rtf
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Unformatted sample text from the term paper:
of sunlight, using the process of photosynthesis to harness the suns rays as an energy source. The following examination of contrasts and compares these two systems, indicating their similarities and
differences. Solar cells harness the power of sunlight, "the most abundant and free form of energy," and they do so without using any moving parts or components, or also
without producing any forms of pollution that adversely affect the environment (Gevorkian, 2008, p. 1). Likewise, plants have no moving parts and also do not produce any emissions that are
harmful. However, photosynthesis does produce an emission that is helpful to humanity, i.e., oxygen, while solar cells are ecologically neutral. As with photosynthesis in plants, the generation of electricity by
solar cells can occur only when the sun is shining. Therefore, electricity generation is limited to daylight hours and its best performance is only in strong sunlight (Solway, 2008).
Solar cells work through the absorption of a photon of light, which occurs near its contact region, which is referred to as "the junction," an area "either between a metal
and a semiconductor or between two different semiconductors or two types of the same semiconductor" (Cocks, 2009, pp. 69-70). An electrical field is generated from the fact that electrons in
each material are different and diffuse between them, producing an "internal gradient in the electric field across the junction region" (Cocks, 2009, p. 70). The electricity generate by this reaction
is stored in batteries or used directly. The process of photosynthesis is somewhat different, as plants convert the suns energy not into electricity, but rather into chemical energy, which
is stored as food, that is, "energy-rich compounds that can be broken down when energy is needed" (Silverstein, Silverstein and Nunn, 2008, p. 4). Photosynthesis is the process used by
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