Question

In which of the following statements, the obtained impure semiconductor is of $p$-type ?

• A. Germanium is doped with bismuth
• B. Silicon is doped with antimony
• C. Germanium is doped with gallium
• D. Silicon is doped with phosphorus

Answer 1

Answer: (C)

A $p$ -type semiconductor is obtained by the dopping of a trivalent atom. Gallium is trivalent element, so germanium is dōped with gallium.