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Charge carrier density information


Charge carrier density, also known as carrier concentration, denotes the number of charge carriers per volume. In SI units, it is measured in m−3. As with any density, in principle it can depend on position. However, usually carrier concentration is given as a single number, and represents the average carrier density over the whole material.

Charge carrier densities involve equations concerning the electrical conductivity, related phenomena like the thermal conductivity, and chemicals bonds like covalent bond.

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Charge carrier density

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Charge carrier density, also known as carrier concentration, denotes the number of charge carriers per volume. In SI units, it is measured in m−3. As with...

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Charge density

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electromagnetism, charge density is the amount of electric charge per unit length, surface area, or volume. Volume charge density (symbolized by the...

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Charge carrier

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charge carrier is a particle or quasiparticle that is free to move, carrying an electric charge, especially the particles that carry electric charges...

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Carrier generation and recombination

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solid-state physics of semiconductors, carrier generation and carrier recombination are processes by which mobile charge carriers (electrons and electron holes)...

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Charge density wave

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A charge density wave (CDW) is an ordered quantum fluid of electrons in a linear chain compound or layered crystal. The electrons within a CDW form a standing...

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Hall effect

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the electrical charge which gives Ix = ntw(−vx)(−e) where n is charge carrier density, tw is the cross-sectional area, and −e is the charge of each electron...

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Electric current

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the net rate of flow of electric charge through a surface.: 2 : 622  The moving particles are called charge carriers, which may be one of several types...

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Electrical resistivity and conductivity

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the resistance decreases as the charge carrier density (i.e., without introducing further complications, the density of electrons) in the conduction band...

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London moment

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of the object, although the field strength is independent of the charge carrier density in the superconductor. A magnetometer determines the orientation...

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Depletion region

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space charge region, or space charge layer, is an insulating region within a conductive, doped semiconductor material where the mobile charge carriers have...

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Space charge

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point-like charges. This model typically applies when charge carriers have been emitted from some region of a solid—the cloud of emitted carriers can form...

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Current density

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electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined...

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Gunn diode

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relationship. When a high enough potential is applied to the diode, the charge carrier density along the cathode becomes unstable and will develop small segments...

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Drift current

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electrochemistry, drift current is the electric current, or movement of charge carriers, which is due to the applied electric field, often stated as the electromotive...

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Charge transport mechanisms

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the concentration of charge carriers, and assuming that hopping events are independent from each other. Generally, the carrier mobility μ depends on...

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Electrolysis of water

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This can cause overpotential at both electrodes. Pure water has a charge carrier density similar to semiconductors[page needed] since it has a low autoionization...

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Diffusion current

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by the diffusion of charge carriers (electrons and/or electron holes). This is the current which is due to the transport of charges occurring because of...

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Carrier lifetime

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an injection of charge carriers through the first junction from the emitter into the base region, electrons are the charge carriers that are transported...

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Drift velocity

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is the current density flowing through the material, n is the charge-carrier number density, and q is the charge on the charge-carrier. This can also...

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Negative luminescence

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radiation. This effect occurs most efficiently in regions of low charge carrier density. Negative luminescence has also been observed in semiconductors...

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Josephson effect

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}}={\dot {\phi }}_{B}-{\dot {\phi }}_{A}} and the time derivative of charge carrier density n ˙ A {\displaystyle {\dot {n}}_{A}} is proportional to current...

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Step recovery diode

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with time: since charge transport in a junction diode is mainly due to diffusion, i.e. to a non constant spatial charge carrier density caused by bias voltage...

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Electric charge

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hand. Electric current is the flow of electric charge through an object. The most common charge carriers are the positively charged proton and the negatively...

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Electron mobility

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randomly. Therefore, on average there will be no overall motion of charge carriers in any particular direction over time. However, when an electric field...

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Kinetic inductance

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of mobile charge carriers in alternating electric fields as an equivalent series inductance. Kinetic inductance is observed in high carrier mobility conductors...

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List of semiconductor materials

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stoichiometry, most can be obtained as both n-type and p-type. Many have high carrier mobilities and direct energy gaps, making them useful for optoelectronics...

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