What is Photovoltaic Solar? Photovoltaic solar is used to convert sunlight into power, known as solar power or solar energy. The meaning of photovoltaic is: 'photo' means light and 'voltaic' means electricity. Originally the solar photovoltaic was designed only to be used in space because the cost of it was too high for a wider use. Luckily researchers were able to find a way to manufacture economically and making the solar photovoltaic more efficient. Solar photovoltaic is swiftly becoming an extensively used form of renewable energy with several applications.
What does a solar photovoltaic panel consist of?
A solar photovoltaic panel consists of photovoltaic cells. These cells consist of two slim sheets of a semi-conductor, usually silicon. The photons from the sun rays hitting the silicon are soaked up by the sheet and causes some of the electrons to be freed. "Doping", a process of adding impurities to the silicon, is used to increase the activity of free electrons. Doping with phosphorous causes the sheet to become negatively charged. This silicon sheet is known as the N-type. The N-type doped silicon is a better conductor than pure silicon. Doping with boron creates the P-type silicon sheet. This sheet is positively charged. Instead of having free electrons, P-type silicon sheets have stored electrons or 'holes' in the outer shell. When the two thin sheets of silicon are sandwiched together, an electric field is established between them. If a conductive pathway is introduced close to the electric field, there is an increase in the electric activity between the plates and some electrons cause a current to flow through the conductor pathway. A coating is put onto the cell to help it soak up more of the sunlight. The cell is then finished off with a glass cover and a positive and negative terminal is marked on the back.
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How the Solar Photovoltaic Cell works: When the sunlight goes through the silicon sheet in the solar photovoltaic cell, photons from the sunlight is soaked up. The photons' energy is transmitted to the semi-conductor, making lose any free electrons. This is when electricity is produced. The more solar photovoltaic cells are connected together; the electricity's voltage generated becomes more. Solar energy panels combine many cells to generate the electrical energy required for homes or devices. When larger amounts of electricity are needed, the solar panels are mounted together in arrays. The possibility of being able to supply reliable electricity isolated from a distribution grid leads to endless applications. Satellites that orbit the earth, people living or working in remote areas and sailors on yachts all use solar panels for electricity and are now able to work more efficiently.
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