Semiconductors: p-type Doping MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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p-type DopingEasyQuestion 20203

Question

Adding trivalent (Group-III) impurity like boron or aluminium to silicon produces:

A
n-type semiconductor
B
p-type semiconductor
Correct
C
Intrinsic semiconductor
D
Conductor

Correct answer

p-type semiconductor

Explanation

Trivalent atoms have 3 valence electrons — all 3 form covalent bonds but one bond is incomplete → hole created. Holes are the majority carriers → p-type (positive carriers majority).

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