Answer:- Trivalent pollutant out from III group elements is used as an impurity in a p-type semiconductor. Aluminium, Indium, and Gallium are trivalent impurities contributed to the intrinsic semiconductor. The addition of trivalent impurities creates extra holes recognized as acceptor atoms. A p-type semiconductor’s majority carriers are holes.
Pentavalent pollutant from the V cluster is incorporated into the pure semiconductor in an n-type semiconductor. Pentavalent impurities include arsenic, antimony, bismuth, and others. Donor atoms are pentavalent impurities that provide extra electrons. Electrons constitute the vast majority of charge transporters in n-type semiconductors.