Essay Solar Energy May Save the Earth - 1393 Words

Solar Energy May Save the Earth Abstract: The current energy situation with fossil fuels as the main source of the world’s energy has two main flaws: fossil fuels contribute to global warming via the greenhouse effect and they are limited in the quantity that remains. Solar power solves both of these problems and can be captured by utilizing photovoltaic cells. However, photovoltaic cells have their own drawbacks due to their high costs of installation and maintenance. The world currently functions through the use of fossil fuels. However, fossil fuels possess two significant disadvantages. Fossil fuels harm the global environment because they enhance the greenhouse effect by releasing carbon dioxide, and they release other harmful†¦show more content†¦Large solar plants occupy a vast area of land and threaten wildlife because one square kilometer is needed to produce 40 megawatts of energy from solar power.4 British scientists are attempting to improve the effectiveness of photovoltaic cells by utilizing â€Å"copper indium diselenide and cadmium telluride to find an affordable and more sustainable way to make solar panels to convert light energy into electricity.†5 Solar cells are also known as photovoltaic cells, which suggest that light energy is being converted to electrical energy. Most photovoltaic cells consist of silicon in its crystalline structure. In that structure, each silicon atom has four valence electrons, and each one bonds to an adjacent electron. Silicon then is a poor conductor since electrons cannot move freely through the substance, but the addition of impurities such as phosphorus, which is called doping, to the silicon crystalline structure provide extra electrons called free carriers that can be knocked off the atom via light energy.6 The section of the photovoltaic cell that is doped with phosphorus is called the N-type because it has numerous negatively charged electrons flowing and creating a current. On the other hand, the section of the photovoltaic cell that is doped with boron is called the P-type because boron only has three valence electrons.7 When the N-type andShow MoreRelatedRenewable Energy : The United Stat es Gas892 Words   |  4 Pagesexpensive to afford to fill up our tanks, we are still not focusing more on something that would save the American people billions a year. 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