Question

The impurity atoms with which pure silicon may be doped to make it a p-type semiconductor are those of (a) phosphorus

Answer 1

Phosphorus and arsenic are the most commonly used N-type dopants for silicon; though, antimony can be used. REVIEW: Intrinsic semiconductor materials, pure to 1 part in 10 billion, are poor conductors. N-type semiconductor is doped with a pentavalent impurity to create free electrons.