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Homework Help: Intrinsic semiconductors

  1. Jan 4, 2009 #1
    A semiconductor material has an intrinsic carrier concentration of 5.6 x 10^14 m^-3 at 300K.
    What is the electron concentration when such a semiconductor is p doped with an acceptor concentration Na = 3.9 x 10^18 m-3.

    I have no idea how to approach this question without a value for the energy band gap. Could someone point me in the right direction? Thanks.
  2. jcsd
  3. Jan 4, 2009 #2


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    Homework Helper

    Why do you need the value of Eg for this question? You only need a simple equation for this question.
  4. Jan 5, 2009 #3
    Thanks for the boost in confidence, I've worked it out now anyway.
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