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Wondering about law of mass action

  1. Feb 12, 2007 #1
    I am wondering why the law of mass action in semiconductors is this relation: n*p=ni^2. Any proof of this why is it not n*p=ni^3 or something....Also why doesn't dopants affect this relationship since doesn't dopants increase the overall number of carriers?
  2. jcsd
  3. Feb 12, 2007 #2


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    Does it even make dimensional sense to write n*p=ni^3? You need to learn how the law is derived - you will find it in any solid state electronics text.

    And yes, dopant concentrations are considered in arriving at that final result.
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