Advanced Materials, volume 29, issue 17, pages 1606576

MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm

Nengjie Huo 1
Shuchi Gupta 1
Publication typeJournal Article
Publication date2017-03-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor29.4
ISSN09359648, 15214095
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Mercury telluride (HgTe) colloidal quantum dots (CQDs) have been developed as promising materials for the short and mid-wave infrared photodetection applications because of their low cost, solution processing, and size tunable absorption in the short wave and mid-infrared spectrum. However, the low mobility and poor photogain have limited the responsivity of HgTe CQD-based photodetectors to only tens of mA W-1 . Here, HgTe CQDs are integrated on a TiO2 encapsulated MoS2 transistor channel to form hybrid phototransistors with high responsivity of ≈106 A W-1 , the highest reported to date for HgTe QDs. By operating the phototransistor in the depletion regime enabled by the gate modulated current of MoS2 , the noise current is significantly suppressed, leading to an experimentally measured specific detectivity D* of ≈1012 Jones at a wavelength of 2 µm. This work demonstrates for the first time the potential of the hybrid 2D/QD detector technology in reaching out to wavelengths beyond 2 µm with compelling sensitivity.

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GOST |
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GOST Copy
Huo N. et al. MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm // Advanced Materials. 2017. Vol. 29. No. 17. p. 1606576.
GOST all authors (up to 50) Copy
Huo N., Gupta S., Konstantatos G. MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm // Advanced Materials. 2017. Vol. 29. No. 17. p. 1606576.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1002/adma.201606576
UR - https://doi.org/10.1002/adma.201606576
TI - MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm
T2 - Advanced Materials
AU - Huo, Nengjie
AU - Gupta, Shuchi
AU - Konstantatos, Gerasimos
PY - 2017
DA - 2017/03/01 00:00:00
PB - Wiley
SP - 1606576
IS - 17
VL - 29
SN - 0935-9648
SN - 1521-4095
ER -
BibTex |
Cite this
BibTex Copy
@article{2017_Huo,
author = {Nengjie Huo and Shuchi Gupta and Gerasimos Konstantatos},
title = {MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm},
journal = {Advanced Materials},
year = {2017},
volume = {29},
publisher = {Wiley},
month = {mar},
url = {https://doi.org/10.1002/adma.201606576},
number = {17},
pages = {1606576},
doi = {10.1002/adma.201606576}
}
MLA
Cite this
MLA Copy
Huo, Nengjie, et al. “MoS2 -HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm.” Advanced Materials, vol. 29, no. 17, Mar. 2017, p. 1606576. https://doi.org/10.1002/adma.201606576.
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