Question

For extrinsic semiconductors; when doping level is increased;

• A. Fermi-level of $p$-type semiconductor will go upward and Fermi-level of $n$ -type semiconductors will go downward.
• B. Fermi-level of $p$-type semiconductors will go downward and Fermi-level of $n$ -type semiconductor will go upward.
• C. Fermi-level of both p-type and n-type semiconductors will go upward for $T > T _{ F }$ $K$ and downward for $T < T _{ F } K ,$ where $T _{ F }$ is Fermi temperature.
• D. Fermi-level of p and n-type semiconductors will not be affected.

Answer 1

Answer: (B)

Correct answer is (b) Fermi-level of $p$-type semiconductors will go downward and Fermi-level of $n$ -type semiconductor will go upward.