Journal of Physical Chemistry Letters, volume 11, issue 12, pages 4755-4761
Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots
Publication type: Journal Article
Publication date: 2020-05-27
Q1
Q1
SJR: 1.586
CiteScore: 9.6
Impact factor: 4.8
ISSN: 19487185
PubMed ID:
32459489
Physical and Theoretical Chemistry
General Materials Science
Abstract
Bright and fast fluorescence makes semiconductor nanocrystals, or quantum dots (QDs), appealing for applications ranging from biomedical research to display screens. However, a few percent of their fluorescence intensity is surprisingly slow. Research into this “delayed emission” has been scarce, despite undesired consequences for some applications and potential opportunities for others. Here, we characterize the dynamics of delayed emission exhibited by individual CdSe/CdS core/shell QDs and correlate these with changes in the emission spectrum. The delayed-emission intensity from a single QD fluctuates strongly during an experiment of several minutes and is thus not always “on”, implying that control over delayed emission may be possible. Periods of bright delayed emission correlate with red-shifted emission spectra. This behavior is consistent with exciton polarization by fluctuating electric fields due to diffusing surface charges, which have been known to cause spectral diffusion in QDs. Our findings thus provide a stepping stone for future efforts to control delayed emission.
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Hinterding S. O. M. et al. Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots // Journal of Physical Chemistry Letters. 2020. Vol. 11. No. 12. pp. 4755-4761.
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Hinterding S. O. M., Vonk S. J. W., Van Harten E. J., Rabouw F. T. Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots // Journal of Physical Chemistry Letters. 2020. Vol. 11. No. 12. pp. 4755-4761.
Cite this
RIS
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TY - JOUR
DO - 10.1021/acs.jpclett.0c01250
UR - https://doi.org/10.1021/acs.jpclett.0c01250
TI - Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots
T2 - Journal of Physical Chemistry Letters
AU - Hinterding, Stijn O M
AU - Vonk, Sander J W
AU - Van Harten, Elleke J
AU - Rabouw, Freddy T.
PY - 2020
DA - 2020/05/27
PB - American Chemical Society (ACS)
SP - 4755-4761
IS - 12
VL - 11
PMID - 32459489
SN - 1948-7185
ER -
Cite this
BibTex (up to 50 authors)
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@article{2020_Hinterding,
author = {Stijn O M Hinterding and Sander J W Vonk and Elleke J Van Harten and Freddy T. Rabouw},
title = {Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots},
journal = {Journal of Physical Chemistry Letters},
year = {2020},
volume = {11},
publisher = {American Chemical Society (ACS)},
month = {may},
url = {https://doi.org/10.1021/acs.jpclett.0c01250},
number = {12},
pages = {4755--4761},
doi = {10.1021/acs.jpclett.0c01250}
}
Cite this
MLA
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Hinterding, Stijn O. M., et al. “Dynamics of Intermittent Delayed Emission in Single CdSe/CdS Quantum Dots.” Journal of Physical Chemistry Letters, vol. 11, no. 12, May. 2020, pp. 4755-4761. https://doi.org/10.1021/acs.jpclett.0c01250.