What are the majority charge carriers in N-type semiconductor material?

N-type semiconductor material is produced by doping a pure semiconductor with a pentavalent impurity, such as phosphorus or arsenic. This introduces extra electrons that are not needed to form the atomic bonds in the crystal lattice. These extra electrons are loosely bound and easily become "free electrons," which then act as the primary means of conducting electricity through the material. Because they are the most abundant charge carrier in this type of material, they are known as the "majority" carriers. Holes are the majority carriers in P-type materials, while protons and neutrons are fixed tightly within the atomic nucleus and never participate in electrical conduction.