question_answer

What is the name of the level formed due to impurity atom in p-type in the forbidden gap?

A)  Donor level

B)  Acceptor level

C)  Conduction level

D)  Forbidden level

Correct Answer: B

Solution :

In p-type doping, the impurities have left holes in the atomic structure which tend to attract and hold free electrons; This pulls the fermi level down until it gets close to the valence bond. Hence, name of level formed due to impurity atom is p-type in the forbidden gap is acceptor level.