The carrier density is usually obtained theoretically by integrating the density of states over the energy range of charge carriers in the material (e.g. integrating over the conduction band for electrons, integrating over the … See more

The carrier density is also applicable to metals, where it can be estimated from the simple Drude model. In this case, the carrier density (in this … See more

The carrier density is important for semiconductors, where it is an important quantity for the process of chemical doping. Using band theory, the electron density,$${\displaystyle n_{0}}$$ is number of electrons per unit volume in the conduction band. … See more

The density of charge carriers can be determined in many cases using the Hall effect, the voltage of which depends inversely on the carrier density. See more