chemistry

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(b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

  • chemistry -

    What material?

  • chemistry -

    50 g Si doped with 27g Sb

  • chemistry -

    Here is the full question:
    (a) Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material.
    Answer for a=6.22*10^18
    (b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

  • chemistry -

    a) 6.22*10^18

    b)wavenumber= Eg / hc

    Eg(Silicon band energy)= 1.11 eV (to joules)
    h=6.6*10^-34
    c=3*10^8

    wavenumber= Eg*1.6*10^-19 / hc = 896969.69

  • chemistry -

    8.97*10^5

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