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bandgap
(redirected from Band gap)

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bandgap  (bndgp)
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. See also holesemiconductor laser
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In LED technology, an electrical charge is passed through different semiconductor materials, and different colored lights are generated by the band gap resulting from the recombining of electrons due to the electric charge.
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153 QA377 Written for researchers and students working with partial differential equations, integral equations and inverse problems, this textbook provides an asymptotic theory for eigenvalue problems that can be applied to band gap structures and the optimal design of photonic and phononic crystals.
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g] is the optical band gap and m determines the type of optical transitions and for direct transitions, m = 1/2 and 2, for indirect transitions m = 2 and 3.
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