The Energy Band Model
Definitions:
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Band:
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A range of some physical variable, as of radiation wavelength or frequency.
A range of very closely spaced electron energy levels in solids, the distribution
and nature of which determine the electrical properties of a material.
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Conduction:
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The transmission or conveying of something through a medium or passage,
esp. of electric charge or heat through a conducting medium without perceptible
motion of the medium itself.
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Dopant:
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A small quantity of a substance, such as phosphorus, added to another substance,
such as a semiconductor, to alter the latter's properties.
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Energy:
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The work that a physical system is capable of doing in changing from its
actual state to a specified reference state, the total including, in general,
contributions of potential energy, kinetic energy, and rest energy.
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Gap:
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A suspension of continuity; hiatus. A conspicuous difference; disparity.
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Model:
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A tentative description of a system or theory that accounts for all of
its known properties.
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Valence:
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The capacity of an atom or group of atoms to combine in specific proportions
with other atoms or groups of atoms. A valence electron is in the outer
or next outer shell of an atom and can participate in forming chemical
bonds with other atoms.
