38. (a) The Fermi level is above the top of the silicon valence band. (b) Measured from the top of the valence band, the energy of the donor state is E= 1.11 eV – 0.11 eV = 1.0 eV. We solve EFfrom Eq. 41-6: ()1155ln11.0eV8.62 10eV K300K ln5.00 1010.744eV.FEEk
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