Question

To get p-type semiconductor, impurity to be

added to silicon should have which of the

following numbers of valence electrons?​

Answer 1

Answer :

◈ Doping : It is a process of adding an appropriate amount of suitable impurity to increase the conductivity of intrinsic semiconductors$.$

• p-type semiconductors :

Group 14 element like Si of Ge with group 13 elements like B, Al or Ga. As a result, holes are created. Electrons move to occupy the holes. Thus, holes move towards negatively charged plate as if they carry positive charge. This process is called 'doping with electrons deficit impurities'.

፨ Valence eˉ present in group 13 elements = 3