Solar Cells

Several techniques are used to produce devices that convert light into electricity. There is always some balance to be maintained within how well something works, and how much does it costs to produce, and the same is concerned with the solar energy. One of its use is in solar cells. They are used to change sunlight into electricity. Technically they are known as photo voltaic cell. A photo voltaic cell is a product that creates electricity through light. They can generate electricity from any type of light source its main objective is to collect solar energy from the sun. Photons hit the surface of the solar cells and absorbed by semiconductor like silicon. These photons react with the electrons in the atom and thus produce the desired amount of energy. A group of solar cells that are linked together are known as a module. They form solar panels. The main reason for using silicon is because it is available in abundant on earth after oxygen. They can be used on several places and in various applications like solar watches, lights, calculator, flash lights etc. There are two types of solar cells. First is Crystalline cells and second are “thin-film” cells. Thin-films use chemical compound to semiconduct whereas crystalline cells use crystalline silicon. Thin-film solar cells are much cheaper than crystalline cells. They are less efficient than crystalline cells.