Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems

Sergey I. Pokutnyi

doi:doi:10.11648/j.optics.s.2014030601.13

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Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems

Sergey I. Pokutnyi

Published in Optics (Volume 3, Issue 6-1)

Received: 9 July 2014 Accepted: 15 July 2014 Published: 31 July 2014

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Abstract

The theory of an exciton formed from spatially separated electron and hole (the hole is in the quantum dot volume, and the electron is localized at the outer spherical quantum dot–dielectric matrix interface) is developed within the modified effective mass method. The effect of significantly increasing the exciton binding energy in quantum dots of zinc selenide, synthesized in a borosilicate glass matrix, relative to that in a zinc selenide single crystal is revealed. It was shown that the short-wavelength shift of the peak of the low-temperature luminescence spectrum of samples containing zinc-selenide quantum dots, observed under the experimental conditions, is caused by quantum confinement of the ground-state energy of the exciton with a spatially separated electron and hole. A review devoted to the theory of excitonic quasimolecules (biexcitons) (formed of spatially separated electrons and holes) in a nanosystem that consists of ZnSe quantum dots synthesized in a borosilicate glass matrix is developed within the context of the modified effective mass approximation. It is shown that biexciton (exciton quasimolecule) formation is of the threshold character and possible in nanosystem, in with the spacing between the quantum dots surfaces is larger than a certain critical spacing. On the basis of analogy spectroscopy of electronic states of superatoms (or artificial atoms) and individual alkali metal atoms theoretically predicted a new artificial atom, which is similar to the new alkali metal atom.

Published in	Optics (Volume 3, Issue 6-1) This article belongs to the Special Issue Optics and Spectroscopy of the Charge Carriers and Excitons States in Quasi - Zero - Dimensional Nanostructures
DOI	10.11648/j.optics.s.2014030601.13
Page(s)	10-21
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Excitons, Modified Effective Mass Method, Exciton Binding Energy, Quantum Dots, Excitonic Quasimolecules, Biexcitons, Spatially Separated Electrons and Holes, Superatoms

References

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Sergey I. Pokutnyi. (2014). Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics, 3(6-1), 10-21. https://doi.org/10.11648/j.optics.s.2014030601.13

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ACS Style

Sergey I. Pokutnyi. Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics. 2014, 3(6-1), 10-21. doi: 10.11648/j.optics.s.2014030601.13

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AMA Style

Sergey I. Pokutnyi. Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics. 2014;3(6-1):10-21. doi: 10.11648/j.optics.s.2014030601.13

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@article{10.11648/j.optics.s.2014030601.13,
  author = {Sergey I. Pokutnyi},
  title = {Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems},
  journal = {Optics},
  volume = {3},
  number = {6-1},
  pages = {10-21},
  doi = {10.11648/j.optics.s.2014030601.13},
  url = {https://doi.org/10.11648/j.optics.s.2014030601.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.optics.s.2014030601.13},
  abstract = {The theory of an exciton formed from spatially separated electron and hole (the hole is in the quantum dot volume, and the electron is localized at the outer spherical quantum dot–dielectric matrix interface) is developed within the modified effective mass method. The effect of significantly increasing the exciton binding energy in quantum dots of zinc selenide, synthesized in a borosilicate glass matrix, relative to that in a zinc selenide single crystal is revealed. It was shown that the short-wavelength shift of the peak of the low-temperature luminescence spectrum of samples containing zinc-selenide quantum dots, observed under the experimental conditions, is caused by quantum confinement of the ground-state energy of the exciton with a spatially separated electron and hole. A review devoted to the theory of excitonic quasimolecules (biexcitons) (formed of spatially separated electrons and holes) in a nanosystem that consists of ZnSe quantum dots synthesized in a borosilicate glass matrix is developed within the context of the modified effective mass approximation. It is shown that biexciton (exciton quasimolecule) formation is of the threshold character and possible in nanosystem, in with the spacing between the quantum dots surfaces is larger than a certain critical spacing. On the basis of analogy spectroscopy of electronic states of superatoms (or artificial atoms) and individual alkali metal atoms theoretically predicted a new artificial atom, which is similar to the new alkali metal atom.},
 year = {2014}
}

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TY  - JOUR
T1  - Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems
AU  - Sergey I. Pokutnyi
Y1  - 2014/07/31
PY  - 2014
N1  - https://doi.org/10.11648/j.optics.s.2014030601.13
DO  - 10.11648/j.optics.s.2014030601.13
T2  - Optics
JF  - Optics
JO  - Optics
SP  - 10
EP  - 21
PB  - Science Publishing Group
SN  - 2328-7810
UR  - https://doi.org/10.11648/j.optics.s.2014030601.13
AB  - The theory of an exciton formed from spatially separated electron and hole (the hole is in the quantum dot volume, and the electron is localized at the outer spherical quantum dot–dielectric matrix interface) is developed within the modified effective mass method. The effect of significantly increasing the exciton binding energy in quantum dots of zinc selenide, synthesized in a borosilicate glass matrix, relative to that in a zinc selenide single crystal is revealed. It was shown that the short-wavelength shift of the peak of the low-temperature luminescence spectrum of samples containing zinc-selenide quantum dots, observed under the experimental conditions, is caused by quantum confinement of the ground-state energy of the exciton with a spatially separated electron and hole. A review devoted to the theory of excitonic quasimolecules (biexcitons) (formed of spatially separated electrons and holes) in a nanosystem that consists of ZnSe quantum dots synthesized in a borosilicate glass matrix is developed within the context of the modified effective mass approximation. It is shown that biexciton (exciton quasimolecule) formation is of the threshold character and possible in nanosystem, in with the spacing between the quantum dots surfaces is larger than a certain critical spacing. On the basis of analogy spectroscopy of electronic states of superatoms (or artificial atoms) and individual alkali metal atoms theoretically predicted a new artificial atom, which is similar to the new alkali metal atom.
VL  - 3
IS  - 6-1
ER  -

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Author Information

Sergey I. Pokutnyi

Chu?ko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Str., UA - 03164 Kyiv, Ukraine

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Sergey I. Pokutnyi. (2014). Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics, 3(6-1), 10-21. https://doi.org/10.11648/j.optics.s.2014030601.13

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ACS Style

Sergey I. Pokutnyi. Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics. 2014, 3(6-1), 10-21. doi: 10.11648/j.optics.s.2014030601.13

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AMA Style

Sergey I. Pokutnyi. Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems. Optics. 2014;3(6-1):10-21. doi: 10.11648/j.optics.s.2014030601.13

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@article{10.11648/j.optics.s.2014030601.13,
  author = {Sergey I. Pokutnyi},
  title = {Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems},
  journal = {Optics},
  volume = {3},
  number = {6-1},
  pages = {10-21},
  doi = {10.11648/j.optics.s.2014030601.13},
  url = {https://doi.org/10.11648/j.optics.s.2014030601.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.optics.s.2014030601.13},
  abstract = {The theory of an exciton formed from spatially separated electron and hole (the hole is in the quantum dot volume, and the electron is localized at the outer spherical quantum dot–dielectric matrix interface) is developed within the modified effective mass method. The effect of significantly increasing the exciton binding energy in quantum dots of zinc selenide, synthesized in a borosilicate glass matrix, relative to that in a zinc selenide single crystal is revealed. It was shown that the short-wavelength shift of the peak of the low-temperature luminescence spectrum of samples containing zinc-selenide quantum dots, observed under the experimental conditions, is caused by quantum confinement of the ground-state energy of the exciton with a spatially separated electron and hole. A review devoted to the theory of excitonic quasimolecules (biexcitons) (formed of spatially separated electrons and holes) in a nanosystem that consists of ZnSe quantum dots synthesized in a borosilicate glass matrix is developed within the context of the modified effective mass approximation. It is shown that biexciton (exciton quasimolecule) formation is of the threshold character and possible in nanosystem, in with the spacing between the quantum dots surfaces is larger than a certain critical spacing. On the basis of analogy spectroscopy of electronic states of superatoms (or artificial atoms) and individual alkali metal atoms theoretically predicted a new artificial atom, which is similar to the new alkali metal atom.},
 year = {2014}
}

Copy | Download

TY  - JOUR
T1  - Theory of Excitons and Excitonic Quasimolecules Formed from Spatially Separated Electrons and Holes in Quasi - Zero - Dimensional Nanosystems
AU  - Sergey I. Pokutnyi
Y1  - 2014/07/31
PY  - 2014
N1  - https://doi.org/10.11648/j.optics.s.2014030601.13
DO  - 10.11648/j.optics.s.2014030601.13
T2  - Optics
JF  - Optics
JO  - Optics
SP  - 10
EP  - 21
PB  - Science Publishing Group
SN  - 2328-7810
UR  - https://doi.org/10.11648/j.optics.s.2014030601.13
AB  - The theory of an exciton formed from spatially separated electron and hole (the hole is in the quantum dot volume, and the electron is localized at the outer spherical quantum dot–dielectric matrix interface) is developed within the modified effective mass method. The effect of significantly increasing the exciton binding energy in quantum dots of zinc selenide, synthesized in a borosilicate glass matrix, relative to that in a zinc selenide single crystal is revealed. It was shown that the short-wavelength shift of the peak of the low-temperature luminescence spectrum of samples containing zinc-selenide quantum dots, observed under the experimental conditions, is caused by quantum confinement of the ground-state energy of the exciton with a spatially separated electron and hole. A review devoted to the theory of excitonic quasimolecules (biexcitons) (formed of spatially separated electrons and holes) in a nanosystem that consists of ZnSe quantum dots synthesized in a borosilicate glass matrix is developed within the context of the modified effective mass approximation. It is shown that biexciton (exciton quasimolecule) formation is of the threshold character and possible in nanosystem, in with the spacing between the quantum dots surfaces is larger than a certain critical spacing. On the basis of analogy spectroscopy of electronic states of superatoms (or artificial atoms) and individual alkali metal atoms theoretically predicted a new artificial atom, which is similar to the new alkali metal atom.
VL  - 3
IS  - 6-1
ER  -

Copy | Download