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For a p-type semiconductor, which of the following statements is true ?  

(1) Electrons are the majority carriers and trivalent atoms are the dopants.  

(2) Holes are the majority carriers and trivalent atoms are the dopants.  

(3) Holes are the majority carriers and pentavalent atoms are the dopants.  

(4) Electrons are the majority carriers and pentavalent atoms are the dopants

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1 Answer

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The correct option is (2).

Explanation:

In a p-type semiconductor holes are majority carriers and trivalent atoms are dopants as it is formed by doping of a trivalent atom in a tetravalent crystal.

Trivalent atoms have an electron less than a tetravalent atom, hence a number of holes are greater than the number of electrons (As Absence of electron represents hole).So, holes are the majority carriers.

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