Question

A semiconductor doped with a donor impurity is.

Answer 1

Is called N-type.

An element which when added to a semiconductor provides unbound or free electrons to the semiconductor which may serve as current carriers. Typically, donors are atoms which have more valence electrons than the atoms of the semiconductor material into which they are introduced in small quantities as an impurity or dopant. Since such donor impurities have more valence electrons than the semiconductor, a semiconductor doped with donor impurities is an n-type semiconductor.