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Charge carrier - Wikipedia
In solid state physics, a charge carrier is a particle or quasiparticle that is free to move, carrying an electric charge, especially the particles that carry electric charges in electrical conductors. Examples are electrons, ions and holes. In a conducting medium, an electric field can exert force on these free … See more
In conducting media, particles serve to carry charge:
• In many metals, the charge carriers are electrons. One or two of the valence electrons from … See moreThere are two recognized types of charge carriers in semiconductors. One is electrons, which carry a negative electric charge. … See more
1897J.J. Thomson discovers the electron, the first known charge carrier in physics.1904John Ambrose Fleming invents the vacuum tube, which uses free electrons as charge carriers in a vacuum.1928Felix Bloch and Lev Landau develop the theory of Fermi gas, which describes the behavior of free electrons in metals.1930s-1940sThe concept of holes as positive charge carriers in semiconductors is developed by William Shockley, Walter Brattain, John Bardeen, and others.1954Gerald Pearson, Calvin Fuller, and Daryl Chapin create the first solar cell, which uses light to generate charge carriers in semiconductors.1962Nick Holonyak Jr. invents the first visible light-emitting diode (LED), which uses optical recombination of charge carriers in semiconductors.Superconductors have zero electrical resistance and are therefore able to carry current indefinitely. This type of conduction is possible by the … See more
Plasmas consists of ionized gas. Electric charge can cause the formation of electromagnetic fields in plasmas, which can lead to the formation of currents or even multiple … See more
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WEBCharge carriers are particles or holes that freely move within a material and carry an electric charge. In most electric circuits and electric devices, the charge carriers are negatively charged electrons that move under …
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22.3: Charge Carriers in Semiconductors
WEBIn a semiconductor the charge is not carried exclusively by electrons. Positively charged holes also carry charge. These may be viewed either as vacancies in the otherwise filled valence band, or equivalently as …
6.4: Charge Carriers in Semiconductors - Statics and …
WEBSep 20, 2022 · Here \(\kappa\) is the dielectric constant of the semiconductor matrix – excluding the dopants and charge carriers, which in this approach are treated as explicit (“stand-alone”) charges, with the …
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