Lecture Notes_3-4_Carriers_Ef_2014

C moves up toward the middle of the band gap the

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Unformatted text preview: states in the C.B. and V.B. is the same). Even if there is a difference in the effective mass, hence, density of states, the factor (kT/2)ln(NV/NC) is small compared to (EC + EV)/2. Therefore, we always say that the intrinsic Fermi level is in the middle of the band gap. 24 (D) The Fermi level in an n- type S.C. is below but near EC because there is a higher probability of finding an electron in the C.B. 25 In an n- type S.C., electrons are the majority carriers, and holes minority...
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