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How Do Solar Panels Turn Sunlight into Electricity?
太阳能电池板如何把阳光变成电？
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Solar panels contain many silicon-based photovoltaic cells that absorb sunlight.
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When photons hit these cells, they knock electrons loose from their atoms.
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This movement of free electrons creates an electric current inside the cell.
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Metal contacts on the top and bottom of each cell collect this current for use.
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An inverter then changes the direct current (DC) into alternating current (AC) for homes.
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Efficiency depends on light intensity, panel angle, and how clean the surface is.
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Even on cloudy days, panels still generate some electricity—just less than in full sun.
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Newer panels use multiple layers to capture different light wavelengths more effectively.
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They produce no emissions while operating, making them vital for clean energy goals.
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Regular maintenance and smart placement help maximize long-term power output.