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Chemistry

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(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.

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

  • Chemistry -

    For a) 6.22*10^18

  • Chemistry -

    Any ideas for b)

  • Chemistry -

    I'll be appreciate if you tell me about b

  • Chemistry -

    9.1E21

  • Chemistry -

    NOT RIGHT

  • Chemistry -

    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 -

    Thank you for the explanation.

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