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Electronic structure and photoexcited-carrier dynamics in nanometer-size CdSe clusters
Abstract
We use transient optical hole burning and photoluminescence to investigate the static and dynamic electronic properties of 32-\AA{} CdSe quantum dots. We observe a number of discrete electronic transitions, resolve LO-phonon progressions, and obtain homogeneous linewidths and electron--LO-phonon couplings. We find that the band-gap luminescence is not from the exciton state, but from a surface trapped state. Rapid (\ensuremath{\sim}160 fs) trapping into these surface states results in long-lived (\ensuremath{\sim}10--100 ns) bleach and induced-absorption features in pump-probe experiments.
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Citations
Cited by
Quantum Dots and Their Multimodal Applications: A Review
Bera, D., Qian, L., Tseng, T.-K., & Holloway, P. H. (2010) · Materials · doi:10.3390/ma3042260 · Cited by 1,365
The Electronic Structure of Semiconductor Nanocrystals
Efros, A. L., & Rosen, M. (2000) · Annual Review of Materials Science · doi:10.1146/annurev.matsci.30.1.475 · Cited by 965
Size dependence of nanostructures: Impact of bond order deficiency
Sun, C. Q. (2007) · Progress in Solid State Chemistry · doi:10.1016/j.progsolidstchem.2006.03.001 · Cited by 873
Quantum confinement effects in semiconductor clusters
Rama Krishna, M. V., & Friesner, R. A. (1991) · The Journal of Chemical Physics · doi:10.1063/1.461258 · Cited by 329
Luminescence polarization of CdSe microcrystals
Efros, A. L. (1992) · Physical Review B · doi:10.1103/physrevb.46.7448 · Cited by 313
Metadata
- Authors
- Bawendi, M. G., Wilson, W. L., Rothberg, L., Carroll, P. J., Jedju, T. M., Steigerwald, M. L., & Brus, L. E.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1990-09-24
- Volume
- 65
- Issue
- 13
- Pages
- 1623-1626
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W2023188395
- Cited by
- 609
- References
- 0
- FWCI
- 33.85
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Electronic structure and photoexcited-carrier dynamics in nanometer-size CdSe clusters. https://app.cochat.ai/papers/10.1103/physrevlett.65.1623
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- Bawendi, M. G., Wilson, W. L., Rothberg, L., Carroll, P. J., Jedju, T. M., Steigerwald, M. L., & Brus, L. E. (1990). Electronic structure and photoexcited-carrier dynamics in nanometer-size CdSe clusters. Physical Review Letters. https://doi.org/10.1103/physrevlett.65.1623
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