Bandgap meaning

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The difference in energy between electron orbitals in which the electrons are not free to move (called valence bands ) and orbitals in which they are relatively free and can carry a current (called conduction bands ).
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The difference in energy in a substance between electron orbitals in which the electrons are not free to move (the valence band ) and orbitals in which they are relatively free and will carry a current (the conduction band ). In semiconductors, some electrons are sustained in the conduction band by thermal energy. Energy released when an electron in the conduction band falls into a hole in the valence band is called bandgap radiation .
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In a material, the energy difference between its non-conductive state and its conductive state. There is virtually no bandgap in most metals, but a very large one in an insulator (dielectric). In a semiconductor, the bandgap is small. Technically, the bandgap is the energy it takes to move electrons from the valence band to the conduction band.
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(physics) The energy difference between two allowed ranges of electron energy in a solid; especially the difference between the energies of the valence band and the conduction band.
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