What are solar cells and how do they work?
Solar cells are devices which convert solar energy directly into electricity. The most common solar cells function by the photovoltaic effect. Photo- means light and -voltaic means electrical current or electricity. (light-electricity) A solar cell supplies direct current (DC) electricity that can be used to power DC motors and light bulbs among other things. Solar cells can even be used to charge rechargeable batteries so that electricity can be stored or transported for later use when the sun is not available. [You can save for rainy days and long dark nights!!] Solar cells provide DC electricity similar to batteries however, batteries differ because they operate through a process known as an electrochemical reaction. This process will provide an electrical current (electro-) from a chemical reaction (-chemical) that occurs inside the battery. When you hook up a light or motor to the battery, also known as a load, the reaction begins and electrons flow as shown in the picture: “Simpl
