conduction band


Also found in: Dictionary, Acronyms, Wikipedia.
Related to conduction band: Fermi level

Conduction band

The electronic energy band of a crystalline solid which is partially occupied by electrons. The electrons in this energy band can increase their energies by going to higher energy levels within the band when an electric field is applied to accelerate them or when the temperature of the crystal is raised. These electrons are called conduction electrons, as distinct from the electrons in filled energy bands, which, as a whole, do not contribute to electrical and thermal conduction. In metallic conductors the conduction electrons correspond to the valence electrons (or a portion of the valence electrons) of the constituent atoms. In semiconductors and insulators at sufficiently low temperatures, the conduction band is empty of electrons. Conduction electrons come from thermal excitation of electrons from a lower energy band or from impurity atoms in the crystal. See Band theory of solids, Electric insulator, Semiconductor, Valence band

conduction band

[kən′dək·shən ‚band]
(solid-state physics)
An energy band in which electrons can move freely in a solid, producing net transport of charge.
References in periodicals archive ?
Such high defect structure induces specific interactions between light electromagnetic waves (LEW) and plasmonic waves of free electrons in the conduction band and weakly bound electrons in valence band coupled with the [Ti.
The mechanism of MLCT involves an interfacial phenomenon, as noted by Gratzel and coworkers, that described a very rapid photoinduced electron injection into the conduction band (cb) of Ti[O.
Details of the conduction band parameters and the employed simulation model which is used are presented in section 2, and results for simulation carried out are interpreted in section 3.
Just beneath the surface of the negative electrode, for example, is a conduction band occupied by a horde of roving electrons that lack the energy to escape from the surface.
Reference [1] gives the results predicted by an effective two-band model, one equivalent conduction band and one equivalent valence band at [GAMMA], that includes the densities of states modifications due to high concentrations of dopants and due to many-body effects associated with carrier-carrier interactions.
7 eV, a larger conduction band discontinuity can be engineered.
In a semiconductor, a luminescence photon is emitted when an electron at the bottom of the conduction band fills the hole at the top of the valence band.
To write data, light at one wavelength is absorbed by the material, exciting electrons into the conduction band, where they are trapped.
Actually, at very low temperature, the molecular motion in polymer is frozen and the kinetic energy available for the activation of electrons to jump to the conduction band is very low.