Knowledge Base
solar, cells are semiconductor materials that, when struck by sufficient amounts of light, cause electrons to flow. Materials with photovoltaic properties include silicon and more complex composites. PV cells convert light energy to electricity as follows:
When light strikes the cell, its energy is absorbed by the semiconductor and knocks loose electrons. The PV cells are designed with layers of slightly different materials that make the loose electrons flow in a specific direction. This is what creates an electric current. Metal contacts are placed at the edges of each cell allowing this current to be drawn off for external use.
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