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NEET 2020 (Phase 2) · Intrinsic & Extrinsic Semiconductors

Intrinsic & Extrinsic Semiconductors question from NEET 2020 (Phase 2)

Q43NEET 2020 · PHASE 2Easy

Intrinsic & Extrinsic Semiconductors

An intrinsic semiconductor is converted into $n$ -type extrinsic semiconductor by doping it with

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Answer: (b)

An n-type semiconductor needs a pentavalent (donor) impurity.
Phosphorus has 5 valence electrons; Al is trivalent, Ge is tetravalent, Ag is a metal.
So the answer is (b) Phosphorous.

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