Journal of the American Chemical Society, volume 136, issue 25, pages 8883-8886
Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100).
Ju Young Woo
1
,
Jae-Hyeon Ko
2
,
Jung Hoon Song
1
,
Kyungnam Kim
1
,
Hyekyoung Choi
1, 3
,
Y H Kim
2
,
So-Hee Jeong
1, 3
Publication type: Journal Article
Publication date: 2014-06-17
Q1
Q1
SJR: 5.489
CiteScore: 24.4
Impact factor: 14.4
ISSN: 00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
The fast degradation of lead selenide (PbSe) nanocrystal quantum dots (NQDs) in ambient conditions impedes widespread deployment of the highly excitonic, thus versatile, colloidal NQDs. Here we report a simple in situ post-synthetic halide salt treatment that results in size-independent air stability of PbSe NQDs without significantly altering their optoelectronic characteristics. From TEM, NMR, and XPS results and DFT calculations, we propose that the unprecedented size-independent air stability of the PbSe NQDs can be attributed to the successful passivation of under-coordinated PbSe(100) facets with atomically thin PbX2 (X = Cl, Br, I) adlayers. Conductive films made of halide-treated ultrastable PbSe NQDs exhibit markedly improved air stability and behave as an n-type channel in a field-effect transistor. Our simple in situ wet-chemical passivation scheme will enable broader utilization of PbSe NQDs in ambient conditions in many optoelectronic applications.
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Woo J. Y. et al. Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100). // Journal of the American Chemical Society. 2014. Vol. 136. No. 25. pp. 8883-8886.
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Woo J. Y., Ko J., Song J. H., Kim K., Choi H., Kim Y. H., Jeong S. Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100). // Journal of the American Chemical Society. 2014. Vol. 136. No. 25. pp. 8883-8886.
Cite this
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TY - JOUR
DO - 10.1021/ja503957r
UR - https://doi.org/10.1021/ja503957r
TI - Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100).
T2 - Journal of the American Chemical Society
AU - Woo, Ju Young
AU - Ko, Jae-Hyeon
AU - Song, Jung Hoon
AU - Kim, Kyungnam
AU - Choi, Hyekyoung
AU - Kim, Y H
AU - Jeong, So-Hee
PY - 2014
DA - 2014/06/17
PB - American Chemical Society (ACS)
SP - 8883-8886
IS - 25
VL - 136
SN - 0002-7863
SN - 1520-5126
ER -
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@article{2014_Woo,
author = {Ju Young Woo and Jae-Hyeon Ko and Jung Hoon Song and Kyungnam Kim and Hyekyoung Choi and Y H Kim and So-Hee Jeong},
title = {Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100).},
journal = {Journal of the American Chemical Society},
year = {2014},
volume = {136},
publisher = {American Chemical Society (ACS)},
month = {jun},
url = {https://doi.org/10.1021/ja503957r},
number = {25},
pages = {8883--8886},
doi = {10.1021/ja503957r}
}
Cite this
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Woo, Ju Young, et al. “Ultrastable PbSe nanocrystal quantum dots via in situ formation of atomically thin halide adlayers on PbSe(100)..” Journal of the American Chemical Society, vol. 136, no. 25, Jun. 2014, pp. 8883-8886. https://doi.org/10.1021/ja503957r.