valence band
Americannoun
noun
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The outermost electron shell of atoms in an insulator or semiconductor, in which the electrons are too tightly bound to the atom to carry electric current.
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Compare conduction band See also bandgap
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In a solar cell, electrons are dislodged by photons and raised to a higher energy level from the valence band to the conduction band.
From Science Daily ● Jan. 10, 2024
The electrons then fall back into the valence band and become worthless in terms of electricity generation.
From Science Daily ● Jan. 10, 2024
Semiconductors conduct electricity when “moderate” amounts of energy are provided to move electrons out of the valence band and into the conduction band.
From Textbooks ● Feb. 14, 2019
In order to conduct electricity, electrons must move from the filled valence band to the empty conduction band where they can move throughout the solid.
From Textbooks ● Feb. 14, 2019
Grain boundaries are typically copper-poor in CIGSSe devices relative to the grain interiors, which modifies the valence band offset such that the boundaries repel holes and recombination is reduced.
From Nature ● Aug. 15, 2012
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