Solar Photovoltaic Cells Essay -- Solar Energy Heat Sun essays

solar Photovoltaic CellsSolar capability is a general margin referring to any process that turns sunlight into energy. Two common forms of solar energy are used today Solar photovoltaic cells and solar thermic engine room. Solar thermal technology uses the heat generated from sunlight to create energy. intimately commonly, this can be used to heat water for a family unit or other projects. Or, with increasing complexity, it can turn the heat into electricity. Unfortunately, a great deal of this technology is too expensive and complex to be practical in the United States on any large scale. However, solar photovoltaic cells are a far more promising technology. They provide a elementary way of turning light directly into energy. This paper will essay how this technology works on a basic level piece of music accessing the possible benefits and problems this technology has. It will also examine possible technology in the future in an attempt to overcome these problems. How solar photovoltaic cells workA photovoltaic cell uses semiconductor material to vary light into electrical energy. Photons from light hitting the material excite electrons, relinquish them from their atoms into the material. Once electrons are excited, they are able to perish freely at bottom the material. The semi-conductor then serves to force the electrons in the desired directions. By creating a connective of a p and n type semiconductor, an electrical potential is created. The electrons move from the n-type to the p-type. Meanwhile, the positively charged atoms move from the p-type to the n-type. As a result, the n-type material gains a positive charge and the p-type gains a negative charge. When an electrical circuit connects the p-type and n-type ends, end in e... ...rrent conventional energy. It has promising chances of reducing carbon dioxide emissions and thus reducing global warming. But, it sill cannot compete economically with current energy means and as a result, more research must be dedicated into the make believe in order for its benefits to be fully realized. Works CitedBerinstein P. 2001. Alternative postcode Facts, Statistics, and Issues. Wesport (CT) Oryx Press 208p.Current Solar Systems Modern Photovoltaic Solar Cells. http//www.personal.psu.edu/users/t/s/tss178/pvcells.htm 2004 Oct 19Ramage J. 1997. Energy, A Guidebook. New York Oxford. 194p.Sorensen B. 2000. Renewable Energy Its physics, engineering, use, environmental impacts, economy and planning aspects. 2nd ed. San Diego Academic Press. 912p.http//www.worldbank.org/html/fpd/energy/subenergy/solar/solar_pv.htm 2004 Oct 18