Nano Letters, volume 15, issue 11, pages 7718-7725

Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots

Marko Kamp 2
Relinde J. A. van Dijk-Moes 1
A. Meijerink 1
1
 
Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Princetonplein 1, 3584 CC Utrecht, The Netherlands
2
 
Center for Nanophotonics, FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
Publication typeJournal Article
Publication date2015-10-27
Journal: Nano Letters
Q1
Q1
SJR3.411
CiteScore16.8
Impact factor9.6
ISSN15306984, 15306992
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Bioengineering
Abstract
The efficiency and stability of emission from semiconductor nanocrystal quantum dots (QDs) is negatively affected by "blinking" on the single-nanocrystal level, that is, random alternation of bright and dark periods. The time scales of these fluctuations can be as long as many seconds, orders of magnitude longer than typical lifetimes of exciton states in QDs. In this work, we investigate photoluminescence from QDs delayed over microseconds to milliseconds. Our results prove the existence of long-lived charge-separated states in QDs. We study the properties of delayed emission as a direct way to learn about charge carrier separation and recovery of the exciton state. A new microscopic model is developed to connect delayed emission to exciton recombination and blinking from which we conclude that bright periods in blinking are in fact not characterized by uninterrupted optical cycling as often assumed.

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GOST Copy
Rabouw F. T. et al. Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots // Nano Letters. 2015. Vol. 15. No. 11. pp. 7718-7725.
GOST all authors (up to 50) Copy
Rabouw F. T., Kamp M., van Dijk-Moes R. J. A., Gamelin D. R., Femius Koenderink A., Meijerink A., Vanmaekelbergh D. Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots // Nano Letters. 2015. Vol. 15. No. 11. pp. 7718-7725.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/acs.nanolett.5b03818
UR - https://doi.org/10.1021/acs.nanolett.5b03818
TI - Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots
T2 - Nano Letters
AU - Rabouw, Freddy T.
AU - Kamp, Marko
AU - van Dijk-Moes, Relinde J. A.
AU - Gamelin, D. R.
AU - Femius Koenderink, A.
AU - Meijerink, A.
AU - Vanmaekelbergh, Daniel
PY - 2015
DA - 2015/10/27
PB - American Chemical Society (ACS)
SP - 7718-7725
IS - 11
VL - 15
SN - 1530-6984
SN - 1530-6992
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{2015_Rabouw,
author = {Freddy T. Rabouw and Marko Kamp and Relinde J. A. van Dijk-Moes and D. R. Gamelin and A. Femius Koenderink and A. Meijerink and Daniel Vanmaekelbergh},
title = {Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots},
journal = {Nano Letters},
year = {2015},
volume = {15},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021/acs.nanolett.5b03818},
number = {11},
pages = {7718--7725},
doi = {10.1021/acs.nanolett.5b03818}
}
MLA
Cite this
MLA Copy
Rabouw, Freddy T., et al. “Delayed Exciton Emission and Its Relation to Blinking in CdSe Quantum Dots.” Nano Letters, vol. 15, no. 11, Oct. 2015, pp. 7718-7725. https://doi.org/10.1021/acs.nanolett.5b03818.
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