Open Access
Proceedings of the National Academy of Sciences of the United States of America, volume 106, issue 9, pages 3011-3016
Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics
Publication type: Journal Article
Publication date: 2009-02-13
Q1
Q1
SJR: 3.737
CiteScore: 19.0
Impact factor: 9.4
ISSN: 00278424, 10916490
PubMed ID:
19218443
Multidisciplinary
Abstract
Charge carrier trapping is an important phenomenon in nanocrystal (NC) decay dynamics because it reduces photoluminescence (PL) quantum efficiencies and obscures efforts to understand the interaction of NC excitons with their surroundings. Particularly crucial to our understanding of excitation dynamics in, e.g., multiNC assemblies, would be a way of differentiating between processes involving trap states and those that do not. Direct optical measurement of NC trap state processes is not usually possible because they have negligible transition dipole moments; however, they are known to indirectly affect exciton photoluminescence. Here, we develop a framework, based on Marcus electron transfer theory, to determine NC trap state dynamics from time-resolved NC exciton PL measurements. Our results demonstrate the sensitivity of PL to interfacial dynamics, indicating that the technique can be used as an indirect but effective probe of trap distribution changes. We anticipate that this study represents a step toward understanding how excitons in nanocrystals interact with their surroundings: a quality that must be optimized for their efficient application in photovoltaics, photodetectors, or chemical sensors.
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Jones M., Lo S. S., Scholes G. D. Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics // Proceedings of the National Academy of Sciences of the United States of America. 2009. Vol. 106. No. 9. pp. 3011-3016.
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Jones M., Lo S. S., Scholes G. D. Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics // Proceedings of the National Academy of Sciences of the United States of America. 2009. Vol. 106. No. 9. pp. 3011-3016.
Cite this
RIS
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TY - JOUR
DO - 10.1073/pnas.0809316106
UR - https://doi.org/10.1073/pnas.0809316106
TI - Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics
T2 - Proceedings of the National Academy of Sciences of the United States of America
AU - Jones, Marcus
AU - Lo, Shun S
AU - Scholes, Gregory D.
PY - 2009
DA - 2009/02/13
PB - Proceedings of the National Academy of Sciences (PNAS)
SP - 3011-3016
IS - 9
VL - 106
PMID - 19218443
SN - 0027-8424
SN - 1091-6490
ER -
Cite this
BibTex (up to 50 authors)
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@article{2009_Jones,
author = {Marcus Jones and Shun S Lo and Gregory D. Scholes},
title = {Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
year = {2009},
volume = {106},
publisher = {Proceedings of the National Academy of Sciences (PNAS)},
month = {feb},
url = {https://doi.org/10.1073/pnas.0809316106},
number = {9},
pages = {3011--3016},
doi = {10.1073/pnas.0809316106}
}
Cite this
MLA
Copy
Jones, Marcus, et al. “Quantitative modeling of the role of surface traps in CdSe/CdS/ZnS nanocrystal photoluminescence decay dynamics.” Proceedings of the National Academy of Sciences of the United States of America, vol. 106, no. 9, Feb. 2009, pp. 3011-3016. https://doi.org/10.1073/pnas.0809316106.