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energy band
 
n
physics See also energy gap a range of energies associated with the quantum states of electrons in a crystalline solid. In a semiconductor or an insulator there is a valence band containing many states, most of which are occupied. Above this is a forbidden band with only a few isolated states caused by impurities. Above this is a conduction band containing many states most of which are empty. In a metal there is a continuous valence-conduction band

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Example sentences
For use at room temperature, the material must also have an energy band gap large enough to preclude thermal excitations.
Energy band schematic of the motion of electrons and holes produced in a silicon gate oxide.
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