Doping of silicon $$(Si)$$  with boron $$(B)$$  leads to :

Solution :
In a $$p$$ - type semiconductor, trivalent impurity from the III group elements is added as the impurity. trivalent impurities like Aluminium, Indium and Gallium are added to the intrinsic semiconductor. The Trivalent impurities added provides extra holes known as the acceptor atom. The majority carries in a $$p$$ - type semiconductor are holes.
In an $$n$$ - type semiconductor, pentavalent impurity from the V group is added to the pure semiconductor . Examples of pentavalent impurities are Arsenic, Antimony, Bismuth etc. The pentavalent impurities provide extra electrons and are termed as donor atoms. Electrons are the majority charge carries in $$n$$ - type semiconductors.