Infrared Physics and Technology, volume 105, pages 103162
Alloyed Ag2SexS1-x quantum dots with red to NIR shift: The band gap tuning with dopant content for energy harvesting applications
Publication type: Journal Article
Publication date: 2020-03-01
Journal:
Infrared Physics and Technology
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 3.3
ISSN: 13504495
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Abstract
Alloyed quantum dots have pulled in a large consideration because of their fascination from visible to near infrared regime. In this work, quantum dots of alloyed Ag2SexS1-x (x = 0, 0.4, 0.6, 1.0) system are synthesized by making use of a simple intermediate temperature method. The structure and morphology of Ag2SexS1-x quantum dots are examined through X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and Raman spectroscopy. The X-ray diffraction data indicates monoclinic and orthorhombic structure of Ag2SexS1-x quantum dots. The size and composition controlled optical bandgap of Ag2SexS1-x quantum dots is meticulously looked into by Ultraviolet-Visible-Near Infrared absorption spectroscopy. The size of alloyed Ag2SexS1-x quantum dots varies from 3.5 nm to 4.8 nm. The bandgap of Ag2SexS1-x quantum dots has varied from 1.35 eV to 0.88 eV as calculated by Tauc plot. The observed values of bandgap indicate quantum confinement in two regimes-weak and strong confinement regimes. The results show that quantum confinement depends on both the size and composition of Ag2SexS1-x quantum dots. The alloying of Se to Ag2S has been confirmed using the Raman spectroscopy. These alloyed quantum dots might be reasonable for catching solar energy particularly from visible to NIR regime.
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Russian Chemical Reviews
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Citations by publishers
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Elsevier
4 publications, 44.44%
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3 publications, 33.33%
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1 publication, 11.11%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 11.11%
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Chand S. et al. Alloyed Ag2SexS1-x quantum dots with red to NIR shift: The band gap tuning with dopant content for energy harvesting applications // Infrared Physics and Technology. 2020. Vol. 105. p. 103162.
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Chand S., Dahshan A., Thakur N., Sharma V., Sharma P. Alloyed Ag2SexS1-x quantum dots with red to NIR shift: The band gap tuning with dopant content for energy harvesting applications // Infrared Physics and Technology. 2020. Vol. 105. p. 103162.
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TY - JOUR
DO - 10.1016/j.infrared.2019.103162
UR - https://doi.org/10.1016/j.infrared.2019.103162
TI - Alloyed Ag2SexS1-x quantum dots with red to NIR shift: The band gap tuning with dopant content for energy harvesting applications
T2 - Infrared Physics and Technology
AU - Chand, Subhash
AU - Dahshan, A.
AU - Thakur, Nagesh
AU - Sharma, Vineet
AU - Sharma, Pankaj
PY - 2020
DA - 2020/03/01 00:00:00
PB - Elsevier
SP - 103162
VL - 105
SN - 1350-4495
ER -
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@article{2020_Chand,
author = {Subhash Chand and A. Dahshan and Nagesh Thakur and Vineet Sharma and Pankaj Sharma},
title = {Alloyed Ag2SexS1-x quantum dots with red to NIR shift: The band gap tuning with dopant content for energy harvesting applications},
journal = {Infrared Physics and Technology},
year = {2020},
volume = {105},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016/j.infrared.2019.103162},
pages = {103162},
doi = {10.1016/j.infrared.2019.103162}
}
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