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Effect of Quantum and Dielectric Confinement on the Exciton−Exciton Interaction Energy in Type II Core/Shell Semiconductor Nanocrystals
Abstract
We study theoretically two electron-hole pair states (biexcitons) in core/shell hetero-nanocrystals with type II alignment of energy states, which promotes spatial separation of electrons and holes. To describe Coulomb interactions in these structures, we apply first-order perturbation theory, in which we use an explicit form of the Coulomb-coupling operator that takes into account interface-polarization effects. This formalism is used to analyze the exciton-exciton interaction energy as a function of the core and shell sizes and their dielectric properties. Our analysis shows that the combined contributions from quantum and dielectric confinement can result in strong exciton-exciton repulsion with giant interaction energies on the order of 100 meV. Potential applications of strongly interacting biexciton states include such areas as lasing, nonlinear optics, and quantum information.
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Dabbousi, B. O., Rodriguez-Viejo, J., Mikulec, F. V., Heine, J. R., Mattoussi, H., Ober, R., Jensen, K. F., & Bawendi, M. G. (1997) · The Journal of Physical Chemistry B · doi:10.1021/jp971091y · Cited by 4,229
Cited by
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Pietryga, J. M., Park, Y.-S., Lim, J., Fidler, A. F., Bae, W. K., Brovelli, S., & Klimov, V. I. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00169 · Cited by 1,040
Self-citationSingle-exciton optical gain in semiconductor nanocrystals
Klimov, V. I., Ivanov, S. A., Nanda, J., Achermann, M., Bezel, I., McGuire, J. A., & Piryatinski, A. (2007) · Nature · doi:10.1038/nature05839 · Cited by 992
Self-citationQuantum confined colloidal nanorod heterostructures for solar-to-fuel conversion
Wu, K., & Lian, T. (2016) · Chemical Society Reviews · doi:10.1039/c5cs00472a · Cited by 305
Metadata
- Authors
- Piryatinski, A., Ivanov, S. A., Tretiak, S., & Klimov, V. I.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-12-02
- Volume
- 7
- Issue
- 1
- Pages
- 108-115
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W1994860069
- Cited by
- 238
- References
- 1
- FWCI
- 6.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Effect of Quantum and Dielectric Confinement on the Exciton−Exciton Interaction Energy in Type II Core/Shell Semiconductor Nanocrystals. https://app.cochat.ai/papers/10.1021/nl0622404
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- Piryatinski, A., Ivanov, S. A., Tretiak, S., & Klimov, V. I. (2007). Effect of Quantum and Dielectric Confinement on the Exciton−Exciton Interaction Energy in Type II Core/Shell Semiconductor Nanocrystals. Nano Letters. https://doi.org/10.1021/nl0622404
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