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On the Absorption Cross Section of CdSe Nanocrystal Quantum Dots
Abstract
The linear absorption cross section is a crucial parameter to the design of nanocrystal quantum dot devices and to the interpretation of spectroscopic data. We measure and report the size-dependent absorption cross section of CdSe nanocrystal quantum dots. We compare the results for absorption far above the band edge, where the quantum dot density of states may be approximated as a continuum, to simple theoretical models of light scattering from light-absorbing small particles. Excellent agreement with theory is found for dilute dispersions in hexane. We find that for absorption at 350 nm the per particle absorption cross section C abs (in cm 2 ) for CdSe is C abs = (5.501 × 10 5 ) a 3 cm -1, where a is the particle radius in cm. The absorption cross section is observed to be largely insensitive to the solvent refractive index. Detailed modeling of the effect of the ligand shell may be necessary to understand the lack of sensitivity of the absorption properties of nanocrystal quantum dots to the refractive index of the medium.
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Cited by
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Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals
Yu, W. W., Qu, L., Guo, W., & Peng, X. (2003) · Chemistry of Materials · doi:10.1021/cm034081k · Cited by 4,997
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Dubertret, B., Skourides, P., Norris, D. J., Noireaux, V., Brivanlou, A. H., & Libchaber, A. (2002) · Science · doi:10.1126/science.1077194 · Cited by 3,019
Anderson, N. C., Hendricks, M. P., Choi, J. J., & Owen, J. S. (2013) · Journal of the American Chemical Society · doi:10.1021/ja4086758 · Cited by 874
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Mekis, I., Talapin, D. V., Kornowski, A., Haase, M., & Weller, H. (2003) · The Journal of Physical Chemistry B · doi:10.1021/jp0278364 · Cited by 375
The Evolution of Quantum Confinement in CsPbBr3 Perovskite Nanocrystals
Butkus, J., Vashishtha, P., Chen, K., Gallaher, J. K., Prasad, S. K. K., Metin, D. Z., Laufersky, G., Gaston, N., Halpert, J. E., & Hodgkiss, J. M. (2017) · Chemistry of Materials · doi:10.1021/acs.chemmater.7b00478 · Cited by 362
Photothermal Heterodyne Imaging of Individual Nonfluorescent Nanoclusters and Nanocrystals
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Metadata
- Authors
- Leatherdale, C. A., Woo, W.-K., Mikulec, F. V., & Bawendi, M. G.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-07-16
- Volume
- 106
- Issue
- 31
- Pages
- 7619-7622
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2013330818
- Cited by
- 839
- References
- 0
- FWCI
- 15.21
- Type
- journal article
- Language
- en
- Open access
- closed
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