Physics - Semiconductors Question with Solution | TestHub
In n-type semiconductor
A) pentavalent impurity are dopants and holes are majority carriers.
B) trivalent impurity are dopants and electrons are minority carriers.
C) pentavalent impurity are dopants and electrons are majority carriers.
D) trivalent impurity are dopants and holes are majority carriers.
Options:
Answer:
Solution:
An n-type semiconductor is obtained by doping an intrinsic semiconductor with pentavalent impurity atoms such as Phosphorus, Arsenic, or Antimony.
Each pentavalent atom donates one extra electron to the crystal lattice, making electrons the majority charge carriers.
Holes are generated only by thermal excitation and act as the minority charge carriers.
Therefore, in an n-type semiconductor, pentavalent impurities are the dopants and electrons are the majority carriers.
Answer: C
