An N-type silicon sample has a uniform density Nd = 10^17cm^–3 of arsenic, and a P-type sample has Na = 10^15cm^–3. A third sample has both impurities present at the same time. (a) Find the equilibrium minority carrier concentrations at 300 K in each sample. (b) Find the conductivity of each sample at 300 K. (c) Find the Fermi level in each material at 300 K with respect to either the conduction band edge (Ec) or the valence band edge (Ev).

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Types of Charge Carriers

A carrier is a type of object which carries a particular thing from one point to another point. For instance, people use different vehicles from one place to another, and the vehicle carries those people and acts as a carrier.