Question

In a n - type semi conductors which of the following statement is true:

• A. Electrons are majority carrier and trivalent impurity are the dopants.
• B. Electrons are minority carrier and pentavalent atoms are dopants.
• C. Holes are minority carrier and pentavalent atoms are dopants.
• D. Holes are majority carrier and trivalent atoms are the dopants.

Answer 1

Answer: (C)

Holes are minority carrier and pentavalent atoms are dopants.

n-type semi-conductor can be produced by doping pentavalent impurity (atoms of valence 5) such as phosphorus.

Because of extra electrons due to pentavalent impurity electrons are majority carriers and holes are minority carriers.

$\therefore$ Here holes are minority carriers and pentavalent atoms are dopants. Hence option C is correct.