Physical Review B, volume 75, issue 24, publication number 245311
Unified picture of electron and hole relaxation pathways in semiconductor quantum dots
Publication type: Journal Article
Publication date: 2007-06-07
Journal:
Physical Review B
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
Size dependent electron and hole relaxation dynamics were measured in colloidal CdSe quantum dots with state-to-state specificity. These experiments reveal the electron and hole state-to-state relaxation dynamics with a precision of $\ensuremath{\sim}10\phantom{\rule{0.3em}{0ex}}\mathrm{fs}$, allowing quantitative evaluation of the manifold of pathways by which an exciton relaxes in strongly confined quantum dots. These experiments corroborate previously observed confinement induced femtosecond Auger relaxation channels for electrons, but with sufficient precision to quantitatively and unambiguously determine the size dependence of the Auger mechanism. These experiments also show that the hole energy loss rate increases for smaller quantum dots, contradicting known relaxation mechanisms for holes. We propose a confinement enhanced mechanism for hole relaxation in colloidal quantum dots, overcoming the predicted phonon bottleneck for holes. The relative contributions of the relaxation pathways are identified for electrons and for holes. These state selective experiments produce a unified picture of the manifold of relaxation pathways available to both electrons and holes in strongly confined colloidal quantum dots.
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Citations by publishers
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American Chemical Society (ACS)
101 publications, 59.06%
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1 publication, 0.58%
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Taylor & Francis
1 publication, 0.58%
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Walter de Gruyter
1 publication, 0.58%
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Proceedings of the National Academy of Sciences (PNAS)
1 publication, 0.58%
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Annual Reviews
1 publication, 0.58%
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SPIE
1 publication, 0.58%
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1 publication, 0.58%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Cooney R. R. et al. Unified picture of electron and hole relaxation pathways in semiconductor quantum dots // Physical Review B. 2007. Vol. 75. No. 24. 245311
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Cooney R. R., Sewall S. L., Dias E. A., Sagar D. M., Anderson K. E. H., Anderson K., Kambhampati P. Unified picture of electron and hole relaxation pathways in semiconductor quantum dots // Physical Review B. 2007. Vol. 75. No. 24. 245311
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TY - JOUR
DO - 10.1103/physrevb.75.245311
UR - https://doi.org/10.1103/physrevb.75.245311
TI - Unified picture of electron and hole relaxation pathways in semiconductor quantum dots
T2 - Physical Review B
AU - Cooney, Ryan R.
AU - Sewall, Samuel L.
AU - Dias, Eva A.
AU - Sagar, D. M.
AU - Anderson, Kevin E H
AU - Kambhampati, Patanjali
AU - Anderson, Kevin
PY - 2007
DA - 2007/06/07 00:00:00
PB - American Physical Society (APS)
IS - 24
VL - 75
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2007_Cooney,
author = {Ryan R. Cooney and Samuel L. Sewall and Eva A. Dias and D. M. Sagar and Kevin E H Anderson and Patanjali Kambhampati and Kevin Anderson},
title = {Unified picture of electron and hole relaxation pathways in semiconductor quantum dots},
journal = {Physical Review B},
year = {2007},
volume = {75},
publisher = {American Physical Society (APS)},
month = {jun},
url = {https://doi.org/10.1103/physrevb.75.245311},
number = {24},
doi = {10.1103/physrevb.75.245311}
}
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