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Fermi Level

  • Fermi level: the thermodynamic electrochemical potential.

  • Upper left, Fermi level for metal.

  • Upper right, Fermi level in undoped semiconductor is roughly equidistant from the valence and conduction band edges.

  • Lower left, Fermi level in p-type semiconductor is near the valence band.

  • Lower right, Fermi level in n-type semiconductor is near the conduction band.