Question

A p-type semiconductor is formed by doping

• A. Silicon with phosphorus
• B. Germanium with antimony
• C. Silicon with boron
• D. Germanium with arsenic

Answer 1

Answer: (C)

Silicon with boron

Answer 2

A p-type semiconductor is formed by doping a tetravalent semiconductor (like Silicon or Germanium) with a trivalent impurity (Group 13 elements like Boron). Boron has 3 valence electrons, and when it replaces a silicon atom, it creates a deficiency of one electron, leading to the formation of a hole, which is the majority charge carrier in a p-type semiconductor.