The conduction band quantifies the range of energy required to free an electron from its bond to an atom. Once freed from this bond, the electron becomes a `delocalized electron`, moving freely within the atomic lattice of the material to which the atom belongs. Various materials may be classified by their band gap: this is defined as the differ.....
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the lowest-lying electron energy band that is not completely filled with electrons.
A partially filled band or a band of vacant energy levels just higher in energy than a filled band; a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.
An energy band in a semiconductor in which electrons can move freely in a solid, producing a net transport of charge. Related category • SEMICONDUCTOR SCIENCE AND TECHNOLOGY
allowed energy band partially occupied by electrons that are therefore free to move under the influence of an external electric fieldpermitted energy band partially occupied by electrons that are free to move under the influence of an external electric field
the lowest-lying electron energy band that is not completely filled with electrons.
A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.
Lowest empty or partially filled band in a semiconductor. 
An energy band in a semiconductor in which electrons can move freely in a solid, producing a net transport of charge.