Advanced Optical Materials, volume 10, issue 2, pages 2101611
Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics
Byung Ku Jung
1
,
Ho-Hyung Woo
1
,
Chanho Shin
2
,
Taesung Park
1
,
Yannan ZHANG
2
,
Kyu Joon Lee
3
,
W. Kim
1
,
Jung Ho Bae
1
,
Jae-Pyoung Ahn
3
,
Tse Nga Ng
2
,
Soong Ju Oh
1
Publication type: Journal Article
Publication date: 2021-11-09
Journal:
Advanced Optical Materials
Q1
Q1
SJR: 2.216
CiteScore: 13.7
Impact factor: 8
ISSN: 21951071
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Abstract
Lead sulfide colloidal quantum dot photodiodes (PbS QDPDs) exhibit a high energy conversion efficiency for infrared detection. Despite the high photoinduced current, the performance of PbS QDPDs is limited by the high dark current which is rarely investigated. Understanding the dark current in PbS QDPDs is critical to improving the detectivity of PbS QDPDs. Herein, it is demonstrated that minority carriers of I-passivated PbS films and trap sites of EDT-passivated PbS films are related to the dark current of PbS QDPD. Utilizing annealing and low-temperature ligand exchange processes, the dark current density can be decreased almost tenfold by suppressing the minority carrier diffusion in the PN junction and trap-assisted charge injection from the electrode. PN junction simulation, space charge limited current measurements, as well as structural, optical, and chemical characterizations are conducted to elucidate the origins of the dark current suppression. The authors achieve the lowest dark current density of 2.9 × 10−5 mA cm−2 at −1 V among PbS-based QDPDs and a high detectivity of 6.7 × 1012 Jones at 980 nm. It is believed that this work provides fundamental understanding of carrier statistics in nanomaterials and device performance as well as a technological basis for realizing low-cost high-performance optoelectronic devices.
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Jung B. K. et al. Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics // Advanced Optical Materials. 2021. Vol. 10. No. 2. p. 2101611.
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Jung B. K., Woo H., Shin C., Park T., ZHANG Y., Lee K. J., Kim W., Bae J. H., Ahn J., Ng T. N., Oh S. J. Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics // Advanced Optical Materials. 2021. Vol. 10. No. 2. p. 2101611.
Cite this
RIS
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TY - JOUR
DO - 10.1002/adom.202101611
UR - https://doi.org/10.1002/adom.202101611
TI - Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics
T2 - Advanced Optical Materials
AU - Jung, Byung Ku
AU - Woo, Ho-Hyung
AU - Shin, Chanho
AU - Park, Taesung
AU - ZHANG, Yannan
AU - Lee, Kyu Joon
AU - Kim, W.
AU - Bae, Jung Ho
AU - Ahn, Jae-Pyoung
AU - Ng, Tse Nga
AU - Oh, Soong Ju
PY - 2021
DA - 2021/11/09
PB - Wiley
SP - 2101611
IS - 2
VL - 10
SN - 2195-1071
ER -
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BibTex (up to 50 authors)
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@article{2021_Jung,
author = {Byung Ku Jung and Ho-Hyung Woo and Chanho Shin and Taesung Park and Yannan ZHANG and Kyu Joon Lee and W. Kim and Jung Ho Bae and Jae-Pyoung Ahn and Tse Nga Ng and Soong Ju Oh},
title = {Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics},
journal = {Advanced Optical Materials},
year = {2021},
volume = {10},
publisher = {Wiley},
month = {nov},
url = {https://doi.org/10.1002/adom.202101611},
number = {2},
pages = {2101611},
doi = {10.1002/adom.202101611}
}
Cite this
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Jung, Byung Ku, et al. “Suppressing the Dark Current in Quantum Dot Infrared Photodetectors by Controlling Carrier Statistics.” Advanced Optical Materials, vol. 10, no. 2, Nov. 2021, p. 2101611. https://doi.org/10.1002/adom.202101611.