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

Options

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

C

Explanation

p-type semiconductor is obtained when silicon (Si) or germanium (Ge) is doped with trivalent impurity like, boron (B), aluminium (Al), gallium (Ga) etc.
n-type semiconductor is obtained when silicon (Si) or germanium (Ge) is doped with pentavalent impurity like arsenic (As), antimony (Sb), bismuth (Bi) etc.