Solar cells are devices that convert sunlight into electricity. They are made of semiconductor materials, such as silicon, cadmium telluride, or copper indium selenide. Solar cells are often used in solar panels, which are arrays of connected solar cells that generate more electricity.
Solar panels were first used in the Space Race to power satellites and space probes. They were later used in terrestrial applications, such as powering homes and businesses. Solar panels are now the most common type of renewable energy system.
How do solar cells work? Sunlight is composed of photons, or particles of light. When these photons strike a solar cell, they knock electrons loose from their atoms. This generates an electric current that can be harnessed to power electrical devices.
Solar cells are usually made from silicon, which is a very good material for absorbing sunlight. However, other materials can be used as well, such as cadmium telluride and copper indium selenide. The choice of material depends on the application for which the solar cell will be used. For example, cadmium telluride is better suited for use in thin-film solar panels because it absorbs more light than silicon does. Copper indium selenide is better suited for use in photovoltaic (PV) cells because it has a higher conversion efficiency than silicon does (meaning it can convert more sunlight into electricity).
What are some uses for solar cells? Solar cells have a wide range of uses due to their ability to generate electricity from sunlight:
-They can power small electronic devices like calculators and watches;
-They can provide backup power for homes and businesses;
-They can charge batteries;