Question

In n-type semiconductors majority charge carriers are

Answer 1

N-type semiconductor

1. When a small number of pentavalent impurities, such as arsenic, antimony, and bismuth are added to a pure semiconductor crystal during the crystal growth, the resulting crystal is called the N-type extensive semiconductor.
2. But since pure semiconductor (tetravalent) atoms have only four electrons and four holes in their valence shell, one spare valence-shell electron is produced for each impurity atom added.
3. Each spare electron enters the conduction band of the pure semiconductor as a free electron.
4. This extra free electron is the majority charge carrier in N-type semiconductors.

Diagram

Thus, in n-type semiconductors majority of charge carriers are electrons.