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Homework Help: Calculate the quasi-Fermi level of holes and electrons?

  1. Apr 6, 2016 #1
    1. The problem statement, all variables and given/known data
    GaAs has an effective density of states (DOS) = 4 × 1017 cm−3 for the conduction band, = 8 × 1018 cm−3 for the valence band and a band gap of = 1.42 eV.
    a) A thin slice of GaAs is illuminated by a cw light source, creating a steady state
    density of 1017 cm−3 of electrons and holes. Calculate the quasi-Fermi level of
    holes and electrons for the system.

    2. Relevant equations
    ni = (NCNV)1/2 (-EG/2kT);
    Ei = EG/2 + kT/2 * ln(NV/NC);

    Efc-Ei = kTln(n/ni);
    Efv-Ei = -kTln(p/ni);

    Efc-Ei = kTln(1017/ni);
    Efv-Ei = -kTln(1017/ni);

    3. The attempt at a solution
    My problem is that this equations is right?
    Last edited: Apr 6, 2016
  2. jcsd
  3. Apr 11, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Apr 12, 2016 #3

    rude man

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    Homework Helper
    Gold Member

    IMO this belongs in the advanced physics forum.
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