Asked by Ling

(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.
Answered by qpt
a) 6.22*10^18

No idea for b) any thoughts or how to for b)?
Answered by schoolgirl
b please...
Answered by Rufus
b) 10^7 / lamda*(wavelength in nm)
Answered by ani
something wrong i cant got it
Answered by martin
rufus, please what is answer
Answered by Anonymous
1.09E13
Answered by Anonymous
WRONG
Answered by qwerty
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
Answered by Anonymous
thanks
Answered by Ling
Thank you for the explanation.
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