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