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Quantum Confinement in Size-Selected, Surface-Oxidized Silicon Nanocrystals
Abstract
The dynamics and spectroscopy of silicon nanocrystals that emit at visible wavelengths were analyzed. Size-selective precipitation and size-exclusion chromatography cleanly separate the silicon nanocrystals from larger crystallites and aggregates and provide direct evidence for quantum confinement in luminescence. Measured quantum yields are as high as 50 percent at low temperature, principally as a result of efficient oxide passivation. Despite a 0.9—electron-volt shift of the band gap to higher energy, the nanocrystals behave fundamentally as indirect gap materials with low oscillator strength.
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Cited by
Carbon quantum dots and their applications
Lim, S. Y., Shen, W., & Gao, Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00269e · Cited by 4,976
Luminescent Carbon Nanodots: Emergent Nanolights
Baker, S. N., & Baker, G. A. (2010) · Angewandte Chemie International Edition · doi:10.1002/anie.200906623 · Cited by 4,921
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
Recent progress in lasers on silicon
Liang, D., & Bowers, J. E. (2010) · Nature Photonics · doi:10.1038/nphoton.2010.167 · Cited by 1,122
Crystallization of Opals from Polydisperse Nanoparticles
Ohara, P. C., Leff, D. V., Heath, J. R., & Gelbart, W. M. (1995) · Physical Review Letters · doi:10.1103/physrevlett.75.3466 · Cited by 384
Metadata
- Authors
- Wilson, W. L., Szajowski, P. F., & Brus, L. E.
- Venue
- Science
- Published
- 1993-11-19
- Volume
- 262
- Issue
- 5137
- Pages
- 1242-1244
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2031305523
- Cited by
- 769
- References
- 0
- FWCI
- 23.44
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wilson, W. L., Szajowski, P. F., & Brus, L. E. (1993). Quantum Confinement in Size-Selected, Surface-Oxidized Silicon Nanocrystals. Science. https://doi.org/10.1126/science.262.5137.1242
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
