conduction band just above the filled valence band.
holes as majority carriers and electrons as minority carriers.
production of $\mathrm{n}$ -type semiconductor.
production of $\mathrm{p}$ -type semiconductor.
Solution
For each donor atom added, there is one electron donated to the semiconductor atom. As a result, the electrons in such type of semiconductors are majority charge carriers. Therefore, this extrinsic semiconductor formed by adding donor impurities are called n-type semiconductors.