Journal of Physical Chemistry C, volume 118, issue 29, pages 16228-16235
Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching
Jing Zhang
1
,
Jason Tolentino
2
,
E Ryan Smith
3
,
Jian Zhang
4
,
Matthew C Beard
3
,
Arthur J. Nozik
1, 3
,
Matt Law
2
,
Justin C. Johnson
3
3
Publication type: Journal Article
Publication date: 2014-07-10
Journal:
Journal of Physical Chemistry C
Q1
Q3
SJR: 0.957
CiteScore: 6.5
Impact factor: 3.3
ISSN: 19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
The temperature-dependent quantum yield of photoluminescence (PL) has been measured in films of various sizes of PbS and PbSe quantum dots (QDs) capped with alkanedithiol ligands with lengths varying from 4 to 20 A. We demonstrate that PL within QD films can provide information about transport in a regime that is relevant to solar photoconversion. The ligand-length dependent PL quenching reveals behavior similar to that of ligand-length dependent carrier mobility determined from field-effect transistor (FET) measurements in the dark. The data are described by a model in which band tail luminescence is quenched upon thermal activation by charge separation and hopping followed by nonradiative recombination. We extract the tunneling parameter β and find values of 1.1 ± 0.2 A–1 except for a value of 0.7 for the smallest QD sample. Changes in the transport mechanism may be due to unique surface faceting or QD-ligand coupling that occurs in small QDs. Furthermore, we compare all-organic capped PbS QD films with...
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Zhang J. et al. Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching // Journal of Physical Chemistry C. 2014. Vol. 118. No. 29. pp. 16228-16235.
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Zhang J., Tolentino J., Smith E. R., Zhang J., Beard M. C., Nozik A. J., Law M., Johnson J. C. Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching // Journal of Physical Chemistry C. 2014. Vol. 118. No. 29. pp. 16228-16235.
Cite this
RIS
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TY - JOUR
DO - 10.1021/jp504240u
UR - https://doi.org/10.1021/jp504240u
TI - Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching
T2 - Journal of Physical Chemistry C
AU - Zhang, Jing
AU - Tolentino, Jason
AU - Smith, E Ryan
AU - Zhang, Jian
AU - Beard, Matthew C
AU - Nozik, Arthur J.
AU - Law, Matt
AU - Johnson, Justin C.
PY - 2014
DA - 2014/07/10
PB - American Chemical Society (ACS)
SP - 16228-16235
IS - 29
VL - 118
SN - 1932-7447
SN - 1932-7455
ER -
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@article{2014_Zhang,
author = {Jing Zhang and Jason Tolentino and E Ryan Smith and Jian Zhang and Matthew C Beard and Arthur J. Nozik and Matt Law and Justin C. Johnson},
title = {Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching},
journal = {Journal of Physical Chemistry C},
year = {2014},
volume = {118},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021/jp504240u},
number = {29},
pages = {16228--16235},
doi = {10.1021/jp504240u}
}
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MLA
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Zhang, Jing, et al. “Carrier Transport in PbS and PbSe QD Films Measured by Photoluminescence Quenching.” Journal of Physical Chemistry C, vol. 118, no. 29, Jul. 2014, pp. 16228-16235. https://doi.org/10.1021/jp504240u.