What is a valence band and a conduction band ?
Asked by NAKSHATRA | 3rd Aug, 2014, 12:05: PM
Expert Answer:
Valence band
- In solids, the valence band is the highest range of electron energies in which electrons are normally present at absolute zero temperature.
- It is that range of electron energy where electrical conduction is not possible.
- Electrons with this much energy is bound into the atomic structure of the material, and are unavailable to conduct an electrical current.
Conduction band
- The conduction band quantifies the range of energy required to free an electron from its bond to an atom. Once freed from this bond, the electron becomes a 'delocalized electron', moving freely within the atomic lattice of the material to which the atom belongs.
- The lowest unfilled energy formed just above the valance band is called conduction band.
- Conduction band is that range of electron energy where electrical conduction is possible.
- Electrons with this much energy is free of their parent atoms, and can move through the medium in which they exist.
Valence band
- In solids, the valence band is the highest range of electron energies in which electrons are normally present at absolute zero temperature.
- It is that range of electron energy where electrical conduction is not possible.
- Electrons with this much energy is bound into the atomic structure of the material, and are unavailable to conduct an electrical current.
Conduction band
- The conduction band quantifies the range of energy required to free an electron from its bond to an atom. Once freed from this bond, the electron becomes a 'delocalized electron', moving freely within the atomic lattice of the material to which the atom belongs.
- The lowest unfilled energy formed just above the valance band is called conduction band.
- Conduction band is that range of electron energy where electrical conduction is possible.
- Electrons with this much energy is free of their parent atoms, and can move through the medium in which they exist.
Answered by Hanisha Vyas | 4th Aug, 2014, 10:39: AM
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