Open Access
Nano Letters, volume 16, issue 10, pages 6070-6077
PbS Nanocrystal Emission Is Governed by Multiple Emissive States
Publication type: Journal Article
Publication date: 2016-09-16
Journal:
Nano Letters
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 10.8
ISSN: 15306984, 15306992
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Bioengineering
Abstract
Lead chalcogenide colloidal nanocrystals (NCs) are promising materials for solution processable optoelectronics. However, there is little agreement on the identity and character of PbS NC emission for different degrees of quantum confinement-a critical parameter for realizing applications for these nanocrystals. In this work, we combine ensemble and single NC spectroscopies to interrogate preparations of lead sulfide NCs. We use solution photon correlation Fourier spectroscopy (S-PCFS) to measure the average single NC linewidth of near-infrared-emitting PbS quantum dots and find it to be dominated by homogeneous broadening. We further characterize PbS NCs using temperature-dependent linear and time-resolved emission spectroscopy which demonstrate that a kinetically accessed defect state dominates room temperature emission of highly confined emitting NCs. These experiments, taken together, demonstrate that the linewidth and Stokes shift of PbS NCs are the result of emission from two states: a thermally accessed defect-with an energetically pinned charge carrier-and an inhomogeneously broadened band-edge state.
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Citations by publishers
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American Chemical Society (ACS)
46 publications, 59.74%
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IOP Publishing
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Optical Society of America
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1 publication, 1.3%
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IEEE
1 publication, 1.3%
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American Physical Society (APS)
1 publication, 1.3%
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American Association for the Advancement of Science (AAAS)
1 publication, 1.3%
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American Institute of Physics (AIP)
1 publication, 1.3%
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Pleiades Publishing
1 publication, 1.3%
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1 publication, 1.3%
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Hindawi Limited
1 publication, 1.3%
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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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Caram J. R. et al. PbS Nanocrystal Emission Is Governed by Multiple Emissive States // Nano Letters. 2016. Vol. 16. No. 10. pp. 6070-6077.
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Caram J. R., Bertram S. N., Utzat H., Hess W. R., Carr J., Bischof T., Beyler A. P., Wilson M., Bawendi M. G. PbS Nanocrystal Emission Is Governed by Multiple Emissive States // Nano Letters. 2016. Vol. 16. No. 10. pp. 6070-6077.
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TY - JOUR
DO - 10.1021/acs.nanolett.6b02147
UR - https://doi.org/10.1021/acs.nanolett.6b02147
TI - PbS Nanocrystal Emission Is Governed by Multiple Emissive States
T2 - Nano Letters
AU - Beyler, Andrew P.
AU - Caram, Justin R.
AU - Bertram, Sophie N
AU - Utzat, Hendrik
AU - Hess, Whitney R
AU - Carr, Jessica
AU - Bischof, T.
AU - Wilson, M.
AU - Bawendi, Moungi G.
PY - 2016
DA - 2016/09/16 00:00:00
PB - American Chemical Society (ACS)
SP - 6070-6077
IS - 10
VL - 16
SN - 1530-6984
SN - 1530-6992
ER -
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@article{2016_Caram,
author = {Andrew P. Beyler and Justin R. Caram and Sophie N Bertram and Hendrik Utzat and Whitney R Hess and Jessica Carr and T. Bischof and M. Wilson and Moungi G. Bawendi},
title = {PbS Nanocrystal Emission Is Governed by Multiple Emissive States},
journal = {Nano Letters},
year = {2016},
volume = {16},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/acs.nanolett.6b02147},
number = {10},
pages = {6070--6077},
doi = {10.1021/acs.nanolett.6b02147}
}
Cite this
MLA
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Caram, Justin R., et al. “PbS Nanocrystal Emission Is Governed by Multiple Emissive States.” Nano Letters, vol. 16, no. 10, Sep. 2016, pp. 6070-6077. https://doi.org/10.1021/acs.nanolett.6b02147.