When a pentavalent impurity is added to a pure semiconductor, it becomes
-
A.
a p-type semiconductor -
B.
an n-type semiconductor -
C.
an insulator -
D.
an intrinsic semi-conductor
Correct Answer: Option B
Explanation
When a pentavalent (5 outer electron)atom is added to a pure semiconductor, there is an extra electrons which does not take part in the covalent bonding resulting in an n-type semiconductor.