Learn photovoltaic technologies When light hits a photovoltaic (PV) cell — also known as a solar cell — that light can be reflected, absorbed, or passed through the cell. PV cells are composed of semiconductor materials; “semi” means it can conduct electricity better than an insulator but not as good as a conductor like metal. There are several different semiconductor materials used in PV cells. When a semiconductor is exposed to light, it absorbs the light’s energy and transfers it to negatively charged particles in the material called electrons. This additional energy allows electrons to flow through the material as an electric current. This current is extracted through conductive metal contacts – grid-like lines on solar cells – and can then be used to power your home and the rest of the grid electricity. The efficiency of a PV cell is simply the amount of electrical power leaving the cell relative to the energy from the light hitting it, indicating how efficiently the cell is at converting energy from one form to another. another form. The amount of electricity generated from PV cells depends on the characteristics (such as intensity and wavelength) of the light available and the many performance properties of the cell. An essential property of PV semiconductors is the frequency band, which indicates the wavelength of light that the material can absorb and convert into electrical energy. If the band of the semiconductor matches the wavelength of light hitting the PV cell, then the cell can efficiently use all available energy.
What is photovoltaic technology? Learn about PV technology | BSLG
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