Question

Electronic configuration of germanium is $2,8,18$ and $4$. To make it extrinsic semiconductor small quantity of antimony is added.

• A. The material obtained will be N -type germanium in which electrons and holes are equal in number.
• B. The material obtained will be P -type germanium.
• C. The material obtained will be N -type germanium which has more electrons than holes at room temperature.
• D. The material obtained will be N -type germanium which has less electrons than holes at room temperature.

Answer 1

Answer: (C)

Antimony is a fifth group impurity and is therefore a donor of electrons.