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How is electricity produced from solar cells?

  1. Sep 23, 2014 #1
    Is electricity produced from solar cell because light has electric and magnetic fields?
     
  2. jcsd
  3. Sep 23, 2014 #2

    ShayanJ

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    Gold Member

    Of course that's the reason but not in a direct sense. Solar cells use photovoltaic effect. When photons strike electrons in the valence band of a material, those electrons may gain enough energy to go to the conduction band, where they are free to move. Now they can move toward a junction and go into a different material. The whole thing is subject to a potential difference that causes the electrons to go into the second material and continue moving there and this is how light produces electricity in solar cells.
     
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