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What is Fermi level? How does this concept works in a semiconductor?

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t=0

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What is Fermi level? How does this concept works in a semiconductor? pleaseee help ... i am struggling with basics.. :???::???::???::???:
 

The term "Fermi level" is the term used to describe the top of the collection of electron energy levels at absolute zero temperature. At absolute zero the Electrons pack into the lowest available energy states and build up a "Fermi sea" of electron energy states. Fermi level is the surface of that sea at absolute zero where no electrons will have enough energy to rise above the surface.
I am pasting here one flow chart just for your basic understanding.
Fermi.jpg
Hope it gives you the basics.
 
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    t=0

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Another definition of Fermi level:
The Fermi level is the amount of work that we need to do for adding one electron to the isolated set of electrons.
 

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