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Question: Answered & Verified by Expert
In a p-type semiconductor,
PhysicsSemiconductorsMHT CETMHT CET 2022 (05 Aug Shift 1)
Options:
  • A holes are majority carriers and trivalent atoms are dopants.
  • B electrons are minority carriers and pentavalent atoms are dopants.
  • C electrons are majority carries and pentavalent atoms are dopants.
  • D holes are minority carriers and trivalent atoms are dopants.
Solution:
1989 Upvotes Verified Answer
The correct answer is: holes are majority carriers and trivalent atoms are dopants.
The correct option is (A)
Concept-Based Question: Option A is true because trivalent atoms are used to dope tetravalent semiconductor materials such as Si or Ge. Doping with impurity in a minor amount generates the majority of carriers (as roughly one impurity atom generates one hole!).

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