An n-type semiconductor is a semiconductor produced by doping an intrinsic semiconductor with an electron-donor impurity – for example,
arsenic or phosphorus in silicon. Both arsenic
and phosphorus are in Group V of the periodic table, meaning that they have
five outer electrons compared with silicon's four. Hence, each impurity
atom can donate one electron which is available for carrying a current.
Compare with p-type semiconductor.
|Silicon doped with arsenic