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Position of the Fermi Level for Extrinsic Semiconductors: Additional Notes for Solid State Physics

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  1. Introduction
  2. What is the position of the Fermi level for an extrinsic semiconductor?
  3. What is the concentration of electrons(holes) in the conduction(valence) band?
  4. The problem from 2006 university exam

In "Position of the Fermi Level for Extrinsic Semiconductors" the author will talk a little more in detail about doped semiconductors. Here, the author answers the following questions: (i) What is the position of the Fermi level for an extrinsic semiconductor? (ii) What is the concentration of electrons(holes) in the conduction(valence) band?

[...] Position of the Fermi Level for Extrinsic Semiconductors Additional Notes for Solid State Physics - Srijit Goswami We will talk a little more in detail about doped semiconductors. Here, we answer the following questions: What is the position of the Fermi level for an extrinsic semiconductor? What is the concentration of electrons(holes) in the conduction(valence) band? C.B EF EC ED V.B EV Figure n-type semiconductor with donor levels The following is a highly simpli?ed treatment of the problem. We will consider n-type semiconductors, as shown in Figure Exactly the same discussion applies to p-type semiconductors. [...]

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