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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.

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)

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

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