- #1

- 360

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^{15}cm

^{-3}donors and 2 x 10

^{15}cm

^{-3}acceptors. Find the position of the Fermi level with respect to E

_{i}at 300 K.

i know the equations are

(for n-type) E

_{F}= kT ln(N

_{D}/n

_{i}) + E

_{i}

(for p-type) E

_{F}= kT ln(n

_{i}/N

_{A}) + E

_{i}

however, since the problem gives me both donors and acceptors, how do i know which one to use? i am thinking since there are more donors than acceptors, i use the equation for n-type...not sure if this is correct though.