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Evidence for a thermal contribution to emission intermittency in single CdSe/CdS core/shell nanocrystals
Abstract
The on–off intermittent behavior of emission from single CdSe/CdS core/shell nanocrystals was investigated as a function of temperature and excitation intensity. Off times were found to be independent of excitation power and the temperature dependence reveals substantial reduction in the number of on–off cycles prior to final particle darkening at low temperatures. On times are found to vary linearly with excitation intensity over a broad range and the turn off rate shows activated Arrhenius behavior down to T=50 K. These observations are consistent with a darkening mechanism that is a combination of Auger photoionization and thermal trapping of charge. The inhomogeneity of various possible trap sites is discussed. A thermally activated neutralization process is required for the particle to return to the on state. The influence of shell composition on intermittency is compared for CdS and ZnS [M. Nirmal et al., Nature 383, 802 (1996)].
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Cites
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
Cited by
Blinking statistics in single semiconductor nanocrystal quantum dots
Shimizu, K. T., Neuhauser, R. G., Leatherdale, C. A., Empedocles, S. A., Woo, W. K., & Bawendi, M. G. (2001) · Physical Review B · doi:10.1103/physrevb.63.205316 · Cited by 580
van Sark, W. G. J. H. M., Frederix, P. L. T. M., Van den Heuvel, D. J., Gerritsen, H. C., Bol, A. A., van Lingen, J. N. J., de Mello Donegá, C., & Meijerink, A. (2001) · The Journal of Physical Chemistry B · doi:10.1021/jp012018h · Cited by 406
Photoenhancement of Luminescence in Colloidal CdSe Quantum Dot Solutions
Jones, M., Nedeljkovic, J., Ellingson, R. J., Nozik, A. J., & Rumbles, G. (2003) · The Journal of Physical Chemistry B · doi:10.1021/jp035598m · Cited by 349
Photon antibunching in single CdSe/ZnS quantum dot fluorescence
Lounis, B., Bechtel, H. A., Gerion, D., Alivisatos, P., & Moerner, W. E. (2000) · Chemical Physics Letters · doi:10.1016/s0009-2614(00)01042-3 · Cited by 339
Metadata
- Authors
- Banin, U., Bruchez, M., Alivisatos, A. P., Ha, T., Weiss, S., & Chemla, D. S.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1999-01-08
- Volume
- 110
- Issue
- 2
- Pages
- 1195-1201
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W2041814735
- Cited by
- 222
- References
- 1
- FWCI
- 12.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Banin, U., Bruchez, M., Alivisatos, A. P., Ha, T., Weiss, S., & Chemla, D. S. (1999). Evidence for a thermal contribution to emission intermittency in single CdSe/CdS core/shell nanocrystals. The Journal of Chemical Physics. https://doi.org/10.1063/1.478161
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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.
