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Homework Help: Calculating Absorption Coefficient

  1. May 20, 2012 #1
    I am currently trying to graph the absorption coefficient of Copper tetra-tert butyl phthlocyanine. I have the extinction coefficient vs wavelength graph and refraction vs wavelength graph however I don't know how to use these to graph absorption coefficient.


    absorption coef. = A* √(hv-Eg)
    h = planks cons.
    v = freq. of electron
    Eg = band gap
    A* is a certain frequency-independent constant, with formula above????

    a' = (4∏K)/λo
    k = extinction coef.

    absorption coef. = A* √(E(eV)-Eg)

    Not a clue....
  2. jcsd
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