Question

why a semiconductor is doped with trivalent or pentavalent atoms if so why can't a silicon atom can be doped with Silicon atom?​

Answer 1

Explanation:

Pentavalent impurity atoms have 5 valence electrons. ... Trivalent impurity atoms have 3 valence electrons. The various examples of trivalent impurities include Boron (B), Gallium (G), Indium(In), Aluminium(Al). Boron is a substance consisting of atoms which all have the same number of protons.