Open Access
Nano Convergence, volume 7, issue 1, publication number 28
Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots
Jin Beom Kwon
1
,
Sae-Wan Kim
1
,
Byoung-Ho Kang
2
,
Se-Hyuk Yeom
2
,
Wang Hoon Lee
2
,
Dae-Hyuk Kwon
3
,
Jae Sung LEE
2
,
Shin-Won Kang
1
2
Advanced Semiconductor Research Center, Gumi Electronics and Information Technology Research Institute (GERI), Gumi, Republic of Korea
|
3
Department of Electronic Engineering, Kyungil University, Hayang-up, Republic of Korea
|
Publication type: Journal Article
Publication date: 2020-08-17
General Materials Science
General Engineering
Abstract
InGaAs-based photodetectors have been generally used for detection in the short-wave infrared (SWIR) region. However, the epitaxial process used to grow these materials is expensive; therefore, InGaAs-based photodetectors are limited to space exploration and military applications. Many researchers have expended considerable efforts to address the problem of SWIR photodetector development using lead sulfide (PbS) quantum dots (QDs). Along with their cost-efficient solution processability and flexible substrate compatibility, PbS QDs are highly interesting for the quantum-size-effect tunability of their bandgaps, spectral sensitivities, and wide absorption ranges. However, the performance of PbS QD-based SWIR photodetectors is limited owing to inefficient carrier transfer and low photo and thermal stabilities. In this study, a simple method is proposed to overcome these problems by incorporating CdS in PbS QD shells to provide efficient carrier transfer and enhance the long-term stability of SWIR photodetectors against oxidation. The SWIR photodetectors fabricated using thick-shell PbS/CdS QDs exhibited a high on/off (light/dark) ratio of 11.25 and a high detectivity of 4.0 × 1012 Jones, which represents a greater than 10 times improvement in these properties relative to those of PbS QDs. Moreover, the lifetimes of thick-shell PbS/CdS QD-based SWIR photodetectors were significantly improved owing to the self-passivation of QD surfaces.
Top-30
Citations by journals
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1
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Journal of Mechanical Science and Technology
1 publication, 6.67%
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Journal of the Korean Physical Society
1 publication, 6.67%
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Materials Science in Semiconductor Processing
1 publication, 6.67%
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Journal Physics D: Applied Physics
1 publication, 6.67%
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Organic Electronics
1 publication, 6.67%
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Journal of Materials Chemistry C
1 publication, 6.67%
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Advanced Electronic Materials
1 publication, 6.67%
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ACS Applied Nano Materials
1 publication, 6.67%
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Nano Energy
1 publication, 6.67%
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Russian Chemical Reviews
1 publication, 6.67%
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Journal of Physical Chemistry C
1 publication, 6.67%
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Scientific Reports
1 publication, 6.67%
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Optics and Laser Technology
1 publication, 6.67%
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1
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Citations by publishers
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1
2
3
4
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Elsevier
4 publications, 26.67%
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Springer Nature
2 publications, 13.33%
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American Chemical Society (ACS)
2 publications, 13.33%
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Korean Society of Mechanical Engineers
1 publication, 6.67%
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IOP Publishing
1 publication, 6.67%
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Royal Society of Chemistry (RSC)
1 publication, 6.67%
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Wiley
1 publication, 6.67%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 6.67%
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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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Kwon J. B. et al. Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots // Nano Convergence. 2020. Vol. 7. No. 1. 28
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Kwon J. B., Kim S., Kang B., Yeom S., Lee W. H., Kwon D., LEE J. S., Kang S. Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots // Nano Convergence. 2020. Vol. 7. No. 1. 28
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TY - JOUR
DO - 10.1186/s40580-020-00238-3
UR - https://doi.org/10.1186/s40580-020-00238-3
TI - Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots
T2 - Nano Convergence
AU - Kwon, Jin Beom
AU - Kim, Sae-Wan
AU - Kang, Byoung-Ho
AU - Yeom, Se-Hyuk
AU - Lee, Wang Hoon
AU - Kwon, Dae-Hyuk
AU - LEE, Jae Sung
AU - Kang, Shin-Won
PY - 2020
DA - 2020/08/17 00:00:00
PB - Springer Nature
IS - 1
VL - 7
SN - 2196-5404
ER -
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@article{2020_Kwon,
author = {Jin Beom Kwon and Sae-Wan Kim and Byoung-Ho Kang and Se-Hyuk Yeom and Wang Hoon Lee and Dae-Hyuk Kwon and Jae Sung LEE and Shin-Won Kang},
title = {Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots},
journal = {Nano Convergence},
year = {2020},
volume = {7},
publisher = {Springer Nature},
month = {aug},
url = {https://doi.org/10.1186/s40580-020-00238-3},
number = {1},
doi = {10.1186/s40580-020-00238-3}
}