potential well

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Related to Quantum confinement: Quantum confinement effect

potential well

n
(General Physics) physics a localized region in a field of force in which the potential has a deep minimum
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Another is a family of colloidal quantum dot photodiodes with visible absorption and an additional sensitivity peak, related to the quantum confinement, which can be tuned for sensitivity between 900 and 2,000nm by changing the quantum dot size.
The results also showed bright multi-colored emissions of blue (B), green (G), yellow (Y), and red (R) from the NBET-CQDs solutions, with gradually increasing sizes from 1.9 nm, to 2.4, 3.0, and 3.9 nm, respectively, as expected from the quantum confinement effect.
Bi is a semimetal with unique physical properties, including long charge carrier mean-free path (~1 micron at room temperature) [27], huge magnetoresistance [24], or quantum confinement effects in nanostructures with dimensions of tens of nanometers [28].
They induce several configurations according to the time evolution of quantum confinement of some rigid structures and so forth.
At 300 K, the slight blue shift of the GS emission of the doped samples may be indicative of a higher interband transition energy and of a weaker quantum confinement of electrons in the GS.
[E.sub.g] shifts in the range of the spectral region between ~0.4 and 3.5 eV when the GS decreases below the size of the excitonic Bohr radius (~18 nm) due to the quantum confinement effect; this is one of the characteristics worthy of investigation in this material.
The origin of "S-band" luminescence, though controversial, can be explained by a quantum confinement model [9].
Therefore, many studies on quantum confinement effects have been performed.
When ZnS is produced in nano-dimensions, quantum confinement effects make the band gap energy of the material dependent only upon the particle size.
Quantum confinement (QC) model has been widely accepted in dealing with the band-gap versus size correlation.
Semiconducting nanoparticles have got immense importance because of their unique optical, electrical and mechanical properties manifested by quantum confinement effect [2].
When the size of semiconductor nanocrystals is smaller than the Bohr radius of the excited electron-hole pair, quantum confinement effect occurs and the band gap energy starts to increase with the decrease of particle size.
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