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Scientific Reports, volume 9, issue 1, publication number 18704

Highly Responsive Ultraviolet Sensor Based on ZnS Quantum Dot Solid with Enhanced Photocurrent

Sellan Premkumar 1, 2, 3
Devaraj Nataraj 1, 4
Bharathi Ganapathi 1
Subramaniam Ramya 1
T. Daniel Thangadurai 5
Publication typeJournal Article
Publication date2019-12-10
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor4.6
ISSN20452322, 20452322
Multidisciplinary
Abstract

Detection of visible blind UV radiation is not only interesting but also of technologically important. Herein, we demonstrate the efficient detection of UV radiation by using cluster like ZnS quantum dot solid nanostructures prepared by simple reflux condensation technique. The short-chain ligand 3-mercaptopropionic acid (MPA) involved in the synthesis lead to the cluster like formation of ZnS quantum dots into solids upon prolonged synthesis conditions. The ZnS QD solid formation resulted in the strong delocalization of electronic wave function between the neighboring quantum dots. It increases the photocurrent value, which can be further confirmed by the decrease in the average lifetime values from 64 to 4.6 ns upon ZnS cluster like QD solid formation from ZnS QDs. The ZnS quantum dot solid based UV sensor shows good photocurrent response and a maximum responsivity of 0.31 (A/W) at a wavelength of 390 nm, is not only competitive when compared with previous reports but also better than ZnS and metal oxide-based photodetectors. The device exhibits a high current value under low-intensity UV light source and an on/off ratio of IUV/Idark = 413 at zero biasing voltage with a fast response. Further, photocurrent device has been constructed using ZnS quantum dot solid nanostructures with graphene hybrids as an active layer to improve the enhancement of photoresponsivity.

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Premkumar S. et al. Highly Responsive Ultraviolet Sensor Based on ZnS Quantum Dot Solid with Enhanced Photocurrent // Scientific Reports. 2019. Vol. 9. No. 1. 18704
GOST all authors (up to 50) Copy
Premkumar S., Nataraj D., Ganapathi B., Ramya S., Thangadurai T. D. Highly Responsive Ultraviolet Sensor Based on ZnS Quantum Dot Solid with Enhanced Photocurrent // Scientific Reports. 2019. Vol. 9. No. 1. 18704
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RIS Copy
TY - JOUR
DO - 10.1038/s41598-019-55097-8
UR - https://www.nature.com/articles/s41598-019-55097-8
TI - Highly Responsive Ultraviolet Sensor Based on ZnS Quantum Dot Solid with Enhanced Photocurrent
T2 - Scientific Reports
AU - Premkumar, Sellan
AU - Nataraj, Devaraj
AU - Ganapathi, Bharathi
AU - Ramya, Subramaniam
AU - Thangadurai, T. Daniel
PY - 2019
DA - 2019/12/10 00:00:00
PB - Springer Nature
IS - 1
VL - 9
PMID - 31822730
SN - 2045-2322
SN - 2045-2322
ER -
BibTex
Cite this
BibTex Copy
@article{2019_Premkumar,
author = {Sellan Premkumar and Devaraj Nataraj and Bharathi Ganapathi and Subramaniam Ramya and T. Daniel Thangadurai},
title = {Highly Responsive Ultraviolet Sensor Based on ZnS Quantum Dot Solid with Enhanced Photocurrent},
journal = {Scientific Reports},
year = {2019},
volume = {9},
publisher = {Springer Nature},
month = {dec},
url = {https://www.nature.com/articles/s41598-019-55097-8},
number = {1},
doi = {10.1038/s41598-019-55097-8}
}
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