What is conduction band?

  • #1
Anyone please explain to me what is conduction band and what are conduction band electrons? What energy do they have and how do they transfer it?
 
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  • #3
Neha Sanghvi said:
What energy do they have and how do they transfer it?
Transfer it to what ?
 
  • #4
Gokul43201 said:
Transfer it to what ?
I mean how do they absorb or radiate energy ( continuously or discreetly )?

P.S. - :smile: Sorry for using the wrong term. Actually, I didn't think someone would read it in so detail! :approve:
 
  • #5
The energy of the electrons in the conduction band is close to the fermi energy of the material. "Gapless" transitions within the conduction band are possible by absorbing very low energy radiation ("nearly" continuous values of frequency). Higher energy photons cause photoionization of the conduction electrons (the photoelectric effect).

Also, you have low lying excitations of the conduction band, known as plasmons, where the incident photon excites fluctuations in the charge density of the conduction electron "gas".
 

1. What is the conduction band?

The conduction band is a part of the energy band structure of a solid material that contains free electrons which can move freely and conduct electricity.

2. How does the conduction band differ from the valence band?

The conduction band is separated from the valence band by an energy gap, where the valence band contains electrons that are tightly bound to the atoms and cannot conduct electricity.

3. What determines the position of the conduction band in a material?

The position of the conduction band is determined by the type of material and its atomic structure. Materials with more free electrons will have a lower conduction band, while materials with less free electrons will have a higher conduction band.

4. How can the conduction band be manipulated?

The conduction band can be manipulated through the addition of impurities or by applying an external electric field. Adding impurities can create extra energy levels in the conduction band, while an electric field can shift the position of the conduction band.

5. What is the significance of the conduction band in electronic devices?

The conduction band is essential for the functioning of electronic devices as it allows for the flow of electric current. The manipulation of the conduction band is also crucial in controlling the conductivity and other properties of electronic materials used in devices.

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