conduction band

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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

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
First, we analyze the effect of the nonparabolicity of the conduction band.
The Fermi surface of the Ce-doped SnO2 supercell with different ratios of rare earth elements enters the conduction band to a different extent, which indicates that the relative electron concentration entering the conduction band of SnO2 supercell is different.
This is likely because CA has a greater capacity to produce photogenerated electrons and, from its excited state, inject these electrons into the Ti[O.sub.2.sup.m] conduction band. A possible explanation for why higher short-circuit current values are reached in CA DSSCs than in carmine DSSCs lies in their different capacities to absorb electromagnetic radiation and generate charge carriers.
As it can be seen from Figure 5, along with the absorption band at 3.0 eV (transitions to the conduction band from aluminum levels), an additional absorption band with the energy of 2.5-2.6 eV is observed.
The conduction band of photocatalyst should be at positive potential as compared to the acceptor's potential in order to transfer an electron to the acceptor.
Here L, [K.sub.eff], q, A, [n.sub.s], [K.sub.B], and T represent photoanode Ti[O.sub.2] thickness, peak frequency of the central arc [[omega].sub.2], the charge of an electron, electrode area, electron density in the conduction band, Boltzmann constant, and absolute temperature.
The states the near band edges from -3.1 eV in occupied valance bands to 3.1 eV in unoccupied conduction bands come from p-electrons, especially dominated by p-electrons of carbon and sulfur atoms, which are mainly responsible from intra bonds of polymeric rings as backbone of the structure.
Conduction band electrons of LiNbO3 are, however, highly reduced and subsequently reduce CO2 to CO[2.sup.-] (1.9V v's SHE) (Table 1) or [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (1.45V v's SHE) unlike TiO2 [21, 22].
where the tunnel generation of an electron at x' is simultaneously associated with the generation of a hole at x, where (x - x') is the spatial separation between the edge of conduction band and valence band at the same energy.
It is working in collaboration with several partners such as ERGOSOFT (Swiss RIP software for digital printing) LA MECCANICA (Italian high-speed digital printing machines) CS COSTRUZIONE (Italian conduction band system) SETEMA (Dutch post treatment system for digital printing) HUNTSMAN (Swiss digital printing inks) and DIGITEX (Hong Kong digital printers ink and media).