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PhysicsSemiconductorsMiscellaneousEasy2 minPYQ_2021
PhysicsEasysingle choice

For extrinsic semiconductors; when doping level is increased;

Options:

Answer:
D
Solution:

In n-type semiconductor pentavalent impurity is added. Each pentavalent impurity donates a free electron. So the Fermi-level of n -type semiconductor will go upward.
& In p-type semiconductor trivalent impurity is added. Each trivalent impurity creates a hole in the valence band. So the Fermi-level of p-type semiconductor will go downward.

Stream:JEESubject:PhysicsTopic:SemiconductorsSubtopic:Miscellaneous
2mℹ️ Source: PYQ_2021

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