ACS Nano, volume 8, issue 8, pages 8676-8682

Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm

Sean E. Keuleyan 1
Philippe Guyot-Sionnest 1
Jing Li 2
Guy Allan 2
Publication typeJournal Article
Publication date2014-08-14
Journal: ACS Nano
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor17.1
ISSN19360851, 1936086X
General Physics and Astronomy
General Materials Science
General Engineering
Abstract
HgTe colloidal quantum dots are synthesized with high monodispersivity with sizes up to ∼15 nm corresponding to a room temperature absorption edge at ∼5 μm. The shape is tetrahedral for larger sizes and up to five peaks are seen in the absorption spectra with a clear size dependence. The size range of the HgTe quantum dots is extended to ∼20 nm using regrowth. The corresponding room temperature photoluminescence and absorption edge reach into the long-wave infrared, past 8 μm. Upon cooling to liquid nitrogen temperature, a photoconductive response is obtained in the long-wave infrared region up to 12 μm. Configuration-interaction tight-binding calculations successfully explain the spectra and the size dependence. The five optical features can be assigned to sets of single hole to single electron transitions whose strengths are strongly influenced by the multiband/multiorbital character of the quantum-dot electronic states.

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GOST |
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GOST Copy
Keuleyan S. E. et al. Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm // ACS Nano. 2014. Vol. 8. No. 8. pp. 8676-8682.
GOST all authors (up to 50) Copy
Keuleyan S. E., Guyot-Sionnest P., Li J., Allan G. Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm // ACS Nano. 2014. Vol. 8. No. 8. pp. 8676-8682.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/nn503805h
UR - https://doi.org/10.1021/nn503805h
TI - Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm
T2 - ACS Nano
AU - Allan, Guy
AU - Keuleyan, Sean E.
AU - Guyot-Sionnest, Philippe
AU - Li, Jing
PY - 2014
DA - 2014/08/14 00:00:00
PB - American Chemical Society (ACS)
SP - 8676-8682
IS - 8
VL - 8
SN - 1936-0851
SN - 1936-086X
ER -
BibTex |
Cite this
BibTex Copy
@article{2014_Keuleyan,
author = {Guy Allan and Sean E. Keuleyan and Philippe Guyot-Sionnest and Jing Li},
title = {Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm},
journal = {ACS Nano},
year = {2014},
volume = {8},
publisher = {American Chemical Society (ACS)},
month = {aug},
url = {https://doi.org/10.1021/nn503805h},
number = {8},
pages = {8676--8682},
doi = {10.1021/nn503805h}
}
MLA
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MLA Copy
Keuleyan, Sean E., et al. “Mercury Telluride Colloidal Quantum Dots: Electronic Structure, Size-Dependent Spectra, and Photocurrent Detection up to 12 μm.” ACS Nano, vol. 8, no. 8, Aug. 2014, pp. 8676-8682. https://doi.org/10.1021/nn503805h.
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