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MHT CET 2024 (11 May, Shift 1) · Intrinsic & Extrinsic Semiconductors

Intrinsic & Extrinsic Semiconductors question from MHT CET 2024 (11 May, Shift 1)

Q22MHT CET 2024 · 11 MAY · SHIFT 1Easy

Intrinsic & Extrinsic Semiconductors

If ' $n_e$ ' and ' $n_h$ ' are the number of electrons and number of holes respectively in a semiconductor heavily doped with phosphorus then

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Answer: (a)

Phosphorus is pentavalent, so heavy doping gives a strongly n-type material.
Since $n_e n_h = n_i^2$ , a very large $n_e$ makes $n_h$ very small.
So the answer is (a) $n_e \gg n_h$ .

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