Question

The level formed due to impurity atom, in the forbidden energy gap, very near to the valence band in a p-type semiconductor is called -

• A. accepter level.
• B. donor level.
• C. conduction level.
• D. forbidden level.

Answer 1

The correct option is A accepter level.

In p-type semiconductors, the trivalent impurity atoms are introduced to an intrinsic semiconductor.

Hence, a hole is introduced due to each impurity atom.

The hole has a tendency to accept an electron from the neighbouring atom.

Thus, the impurity is an acceptor impurity and all the energy level corresponding to acceptor atoms is acceptor level.

​​​​​​​Hence, option $\left(A\right)$ is the correct answer.