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Observation of the "Dark Exciton" in CdSe Quantum Dots
Abstract
We use external magnetic fields to identify the band edge emitting state in CdSe quantum dots. The field dependence of emission decays and LO phonon spectra show the importance of exciton spin dynamics in the recombination mechanism. To interpret our results we calculate the band edge exciton structure, including the effects of the electron-hole exchange interaction and a nonspherical shape. The exchange term, negligible in the bulk, is strongly enhanced by quantum confinement and allows the observation of an optically passive "dark" excitonic state.
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Citations
Cited by
Chemistry and Properties of Nanocrystals of Different Shapes
Burda, C., Chen, X., Narayanan, R., & El-Sayed, M. A. (2005) · Chemical Reviews · doi:10.1021/cr030063a · Cited by 7,230
Shape control of CdSe nanocrystals
Peng, X., Manna, L., Yang, W., Wickham, J., Scher, E., Kadavanich, A., & Alivisatos, A. P. (2000) · Nature · doi:10.1038/35003535 · Cited by 4,487
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
Alivisatos, A. P. (1996) · The Journal of Physical Chemistry · doi:10.1021/jp9535506 · Cited by 3,595
Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots
Klimov, V. I., Mikhailovsky, A. A., Xu, S., Malko, A., Hollingsworth, J. A., Leatherdale, C. A., Eisler, H.-J., & Bawendi, M. G. (2000) · Science · doi:10.1126/science.290.5490.314 · Cited by 2,825
Self-citationGenesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals
Akkerman, Q. A., Rainò, G., Kovalenko, M. V., & Manna, L. (2018) · Nature Materials · doi:10.1038/s41563-018-0018-4 · Cited by 2,287
Metadata
- Authors
- Nirmal, M., Norris, D. J., Kuno, M., Bawendi, M. G., Efros, A. L., & Rosen, M.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1995-11-13
- Volume
- 75
- Issue
- 20
- Pages
- 3728-3731
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1982564571
- Cited by
- 848
- References
- 0
- FWCI
- 18.55
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Observation of the "Dark Exciton" in CdSe Quantum Dots. https://app.cochat.ai/papers/10.1103/physrevlett.75.3728
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- Nirmal, M., Norris, D. J., Kuno, M., Bawendi, M. G., Efros, A. L., & Rosen, M. (1995). Observation of the "Dark Exciton" in CdSe Quantum Dots. Physical Review Letters. https://doi.org/10.1103/physrevlett.75.3728
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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