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In solid-state physics, the valence band and conduction band are the bands closest to the Fermi level, and thus determine the electrical conductivity of the solid.
The valence band is the band of electron orbitals that electrons can jump out of, moving into the conduction band when excited. The valence band is simply the outermost electron orbital of an atom of any specific material that electrons actually occupy.
The valence band is the energy level in an atom that holds the outermost electrons. These electrons are important because they form bonds between atoms, such as covalent, ionic, or metallic bonds. At absolute zero temperature, the valence band is the highest energy level that is completely filled with electrons.
The closest band above the band gap is called the conduction band, and the closest band beneath the band gap is called the valence band. The name "valence band" was coined by analogy to chemistry, since in semiconductors (and insulators) the valence band is built out of the valence orbitals.
Filled bands that lie below the Fermi energy are known as valence bands. In this class, we have mostly considered charge transport through the conduction band. Charge may also move through vacancies in the normally full valence band. These vacancies are known as holes.
Question 1: What is a valence band? Answer 1: The energy band which comprises of valence electrons energy levels is referred to as the valence band. This band is present below the conduction band.
The highest energy band that is filled is known as a valence band. The next available band in the energy structure is known as a conduction band. In a conductor, the highest energy band that contains electrons is partially filled, whereas in an insulator, the highest energy band containing electrons is completely filled.
…material is known as the valence band, and the degree to which it is filled largely determines the material’s electrical conductivity. In a typical conductor (metal), the valence band is about half filled with electrons, which readily move from atom to atom, carrying a current. In a good insulator, such… Read More; semiconductor devices
The highest energy band that is filled is known as a valence band. The next available band in the energy structure is known as a conduction band. In a conductor, the highest energy band that contains electrons is partially filled, whereas in an insulator, the highest energy band containing electrons is completely filled.
Explain how electronic structure and bonding affects the thermal conductivity, electrical conductivity, optical behavior, and other bulk properties of solids. Classify materials as metals, insulators, or semiconductors, and sketch a schematic band diagram for each one, with key features labeled.