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conduction band
(redirected from conduction bands)

   Also found in: Encyclopedia 0.01 sec.
conduction band
n
(Physics / General Physics) See energy band

conduction band
The electron orbital or orbitals, generally the outermost orbitals, in atoms in a conductor or semiconductor, in which the electrons are free enough to move and thereby carry an electric current. Compare valence band. See also bandgap.


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It is evaluated that the decrease in the optical band gap of the poly (3-thiophene boronic acid) is a good thing for the applications of electronic devices based polymer, for example, light emitting diode (LED), because the optical band gap of the semiconductor polymer allows the fabrication of new LEDs in which the color of the emitted light is tuned by the band gap between the valence and conduction bands in the semiconductor polymer (16).
If the bandgap is low, meaning the valence and conduction bands are close together, less energy is required for the material to conduct electricity.
Luminescence starts in semiconductors when electrons, stimulated by lasers or electricity, jump to the conduction bands from the valence bands within the material, leaving "holes" - the positively charged equivalent of electrons.
 
 
 
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