Question

How does the energy gap in an intrinsic semiconductor vary when doped with a pentavalent impurity?

Answer 1

hey mate,

here is your answer,

The gap which is seperating the valence bond and the conduction bond  is known as fermi level.

When an intrinsic semiconductor is doped with impurity it becomes an extrinsic semiconductor.

Now, the fermi level will have to move away from it's mid gap position inorder to conserve the number of particles as well as to maintain the electrical charge neutrality.

In a n-type semiconductor, energy gap decreases.Fermi-level shifts towards the conduction band where , higher number of electrons are available for conduction. In a p-type semiconductor , energy band increases.Fermi levels shifts closer to the valence bond because , holes are the majority carries.

hope this helps you.

mark as brainlist.

:)