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Where will be the position of the Fermi level of the n-type material when ND=NA?

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Where will be the position of the Fermi level of the n-type material when ND=NA?

(a) Ec

(b) Ev

(c) Ef

(d) Efi

I have been asked this question during an online interview.

Origin of the question is Fermi Level in a Semiconductor having Impurities topic in section Conduction in Semiconductors of Electronic Devices & Circuits

1 Answer

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Best answer
Correct choice is (a) Ec

The explanation is: When ND=NA, kTln(ND/NA )=0

So,

Ef=Ec.

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