Open Access
Optical Materials Express, volume 7, issue 8, pages 2905
Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors
Publication type: Journal Article
Publication date: 2017-07-18
Journal:
Optical Materials Express
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 2.8
ISSN: 21593930, 21593930
Electronic, Optical and Magnetic Materials
Abstract
The recent success of the surface passivation of lead chalcogenide quantum dots for enhancing ambient stability offers further investigation of surface states in air. Here we studied the photoresponses due to surface passivation and oxygen, thus providing the relations of surface states and the photoresponse of PbSe QD films by monitoring the changes in QD film with air exposure. A dramatic near-infrared photoresponse was observed when the PbSe film stabilized through surface passivation was exposed to air. As a result of estimating the density of trap states from the FET characteristics, it was confirmed that the iodide-passivated PbSe film exposed to the air had more trap states than the nitrogen atmosphere. The increase of the trap state due to oxygen adsorption led to the increase of the trap-captured photogenerated electrons, which increased the photoconduction gain. Even though some trap states have a negative impact on device parameters such as charge mobility and response time, controlling the oxygen-related trap states on QD surface is expected to enhance the photoresponsivity on the QD-based photoconductive films without performance degradation in air.
Top-30
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Russian Chemical Reviews
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Nanomaterials
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Citations by publishers
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
2 publications, 40%
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Elsevier
2 publications, 40%
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Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 20%
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- We do not take into account publications without a DOI.
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So H. et al. Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors // Optical Materials Express. 2017. Vol. 7. No. 8. p. 2905.
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So H., Woo J. Y., Jeong S., Chang W. S. Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors // Optical Materials Express. 2017. Vol. 7. No. 8. p. 2905.
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TY - JOUR
DO - 10.1364/ome.7.002905
UR - https://doi.org/10.1364/ome.7.002905
TI - Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors
T2 - Optical Materials Express
AU - So, Hye-Mi
AU - Woo, Ju Young
AU - Jeong, Sohee
AU - Chang, Won Seok
PY - 2017
DA - 2017/07/18 00:00:00
PB - Optical Society of America
SP - 2905
IS - 8
VL - 7
SN - 2159-3930
SN - 2159-3930
ER -
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BibTex
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@article{2017_So,
author = {Hye-Mi So and Ju Young Woo and Sohee Jeong and Won Seok Chang},
title = {Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors},
journal = {Optical Materials Express},
year = {2017},
volume = {7},
publisher = {Optical Society of America},
month = {jul},
url = {https://doi.org/10.1364/ome.7.002905},
number = {8},
pages = {2905},
doi = {10.1364/ome.7.002905}
}
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MLA
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So, Hye-Mi, et al. “Oxygen aided photoresponse enhancement of air-stable PbSe quantum dot based photoconductors.” Optical Materials Express, vol. 7, no. 8, Jul. 2017, p. 2905. https://doi.org/10.1364/ome.7.002905.