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Multiexcitons confined within a subexcitonic volume: Spectroscopic and dynamical signatures of neutral and charged biexcitons in ultrasmall semiconductor nanocrystals
Open accessAbstract
The use of ultrafast gating techniques allows us to resolve both spectrally and temporally the emission from short-lived neutral and negatively charged biexcitons in ultrasmall (sub-10 nm) CdSe nanocrystals (nanocrystal quantum dots). Because of ``forced'' overlap of electronic wave functions and reduced dielectric screening, these states are characterized by giant interaction energies of tens (neutral biexcitons) to hundreds (charged biexcitons) of meV. Both types of biexcitons show extremely short lifetimes (from sub-100 picoseconds to sub-picosecond time scales) that rapidly shorten with decreasing nanocrystal size. These ultrafast relaxation dynamics are explained in terms of highly efficient nonradiative Auger recombination.
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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-citationMakarov, N. S., Guo, S., Isaienko, O., Liu, W., Robel, I., & Klimov, V. I. (2016) · Nano Letters · doi:10.1021/acs.nanolett.5b05077 · Cited by 685
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
Efficient Biexciton Interaction in Perovskite Quantum Dots Under Weak and Strong Confinement
Castañeda, J. A., Nagamine, G., Yassitepe, E., Bonato, L. G., Voznyy, O., Hoogland, S., Nogueira, A. F., Sargent, E. H., Cruz, C. H. B., & Padilha, L. A. (2016) · ACS Nano · doi:10.1021/acsnano.6b03908 · Cited by 256
Metadata
- Authors
- Achermann, M., Hollingsworth, J. A., & Klimov, V. I.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2003-12-03
- Volume
- 68
- Issue
- 24
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W2062141872
- Cited by
- 232
- References
- 0
- FWCI
- 8.05
- Type
- journal article
- Language
- en
- Open access
- green
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- Achermann, M., Hollingsworth, J. A., & Klimov, V. I. (2003). Multiexcitons confined within a subexcitonic volume: Spectroscopic and dynamical signatures of neutral and charged biexcitons in ultrasmall semiconductor nanocrystals. Physical Review B. https://doi.org/10.1103/physrevb.68.245302
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