Hint:Trivalent impurities are the doping materials having three electrons in the outermost shell of the atom. Pure semiconductors are converted into p and n types of the semiconductor by doping. ... When the elements are combined with the element of the same element then they are known as the intrinsic semiconductors.

What are pentavalent impurities?

Pentavalent impurities are the atoms with five valence electrons used for the doping of semiconductors. i.e. Arsenic (As), Phosphorous (Pi), Antimony (Sb), etc. ... Arsenic is an example for pentavalent impurity. They have 5 valence electrons.

What is pentavalent impurity and trivalent impurity?

Pentavalent impurities Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons. Trivalent impurities Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a "hole" or electron deficiency.