Expeditious UV detection of tungstite (WO3·H2O) and tungsten oxide (WO3) decorated multiwall carbon nanotubes (MWCNT) based photodetector: ultrafast response and recovery time

Rahul Majumder; Soumalya Kundu; Ria Ghosh; Monalisa Pradhan; Dibyendu Ghosh; Shubham Roy; Subhadip Roy; Manish Pal Chowdhury

doi:10.1007/s42452-019-1799-z

Expeditious UV detection of tungstite (WO₃·H₂O) and tungsten oxide (WO₃) decorated multiwall carbon nanotubes (MWCNT) based photodetector: ultrafast response and recovery time

Rahul Majumder
, Soumalya Kundu
, Ria Ghosh
, Monalisa Pradhan
, Dibyendu Ghosh
, Shubham Roy
, Subhadip Roy
, Manish Pal Chowdhury^*

^*Corresponding author for this work

Bengal Engineering and Science University
Indian Association for the Cultivation of Science
Jadavpur University
Indian Institute of Science Education and Research, Kolkata

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Tungstite (WO₃·H₂O) and tungsten oxide (WO₃) decorated multi-walled carbon nanotube (MWCNT) based ultra-fast UV photodetectors were fabricated and characterized in this work. Tungstite was synthesized by wet chemical route and tungsten oxide was derived by calcinating tungstite at elevated temperatures (723 K and 1023 K). The crystal structures of tungstite and tungsten oxide were confirmed from X-ray diffraction analysis. The UV photo responsive behavior of the tungstite and tungsten oxide decorated MWCNT UV photodetectors were studied using 365 nm UV LED array in the intensity range 15–83 μW cm⁻². The device showed good UV photoresponsivity with high external quantum efficiency (EQE). Tungstite decorated MWCNT UV photodetector exhibited maximum responsivity of 7.4 AW⁻¹ along with EQE of 2550% under the incident UV intensity of 15 μW cm⁻². Up to 500 Hz optical chopping frequency, the devices showed remarkable stability along with good repeatability of UV detection. Response and recovery time is recorded as low as 400 μs and 500 μs respectively for tungstite decorated UV photodetectors.

Original language	English
Article number	81
Journal	SN Applied Sciences
Volume	2
Issue number	1
DOIs	https://doi.org/10.1007/s42452-019-1799-z
State	Published - Jan 2020
Externally published	Yes

Keywords

MWCNT
Recovery time
Response time
Tungsten oxide
Tungstite
UV photodetector

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10.1007/s42452-019-1799-z

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title = "Expeditious UV detection of tungstite (WO3·H2O) and tungsten oxide (WO3) decorated multiwall carbon nanotubes (MWCNT) based photodetector: ultrafast response and recovery time",

abstract = "Tungstite (WO3·H2O) and tungsten oxide (WO3) decorated multi-walled carbon nanotube (MWCNT) based ultra-fast UV photodetectors were fabricated and characterized in this work. Tungstite was synthesized by wet chemical route and tungsten oxide was derived by calcinating tungstite at elevated temperatures (723 K and 1023 K). The crystal structures of tungstite and tungsten oxide were confirmed from X-ray diffraction analysis. The UV photo responsive behavior of the tungstite and tungsten oxide decorated MWCNT UV photodetectors were studied using 365 nm UV LED array in the intensity range 15–83 μW cm−2. The device showed good UV photoresponsivity with high external quantum efficiency (EQE). Tungstite decorated MWCNT UV photodetector exhibited maximum responsivity of 7.4 AW−1 along with EQE of 2550\% under the incident UV intensity of 15 μW cm−2. Up to 500 Hz optical chopping frequency, the devices showed remarkable stability along with good repeatability of UV detection. Response and recovery time is recorded as low as 400 μs and 500 μs respectively for tungstite decorated UV photodetectors.",

keywords = "MWCNT, Recovery time, Response time, Tungsten oxide, Tungstite, UV photodetector",

author = "Rahul Majumder and Soumalya Kundu and Ria Ghosh and Monalisa Pradhan and Dibyendu Ghosh and Shubham Roy and Subhadip Roy and \{Pal Chowdhury\}, Manish",

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year = "2020",

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doi = "10.1007/s42452-019-1799-z",

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volume = "2",

journal = "SN Applied Sciences",

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T2 - ultrafast response and recovery time

AU - Majumder, Rahul

AU - Kundu, Soumalya

AU - Ghosh, Ria

AU - Pradhan, Monalisa

AU - Ghosh, Dibyendu

AU - Roy, Shubham

AU - Roy, Subhadip

AU - Pal Chowdhury, Manish

PY - 2020/1

Y1 - 2020/1

N2 - Tungstite (WO3·H2O) and tungsten oxide (WO3) decorated multi-walled carbon nanotube (MWCNT) based ultra-fast UV photodetectors were fabricated and characterized in this work. Tungstite was synthesized by wet chemical route and tungsten oxide was derived by calcinating tungstite at elevated temperatures (723 K and 1023 K). The crystal structures of tungstite and tungsten oxide were confirmed from X-ray diffraction analysis. The UV photo responsive behavior of the tungstite and tungsten oxide decorated MWCNT UV photodetectors were studied using 365 nm UV LED array in the intensity range 15–83 μW cm−2. The device showed good UV photoresponsivity with high external quantum efficiency (EQE). Tungstite decorated MWCNT UV photodetector exhibited maximum responsivity of 7.4 AW−1 along with EQE of 2550% under the incident UV intensity of 15 μW cm−2. Up to 500 Hz optical chopping frequency, the devices showed remarkable stability along with good repeatability of UV detection. Response and recovery time is recorded as low as 400 μs and 500 μs respectively for tungstite decorated UV photodetectors.

AB - Tungstite (WO3·H2O) and tungsten oxide (WO3) decorated multi-walled carbon nanotube (MWCNT) based ultra-fast UV photodetectors were fabricated and characterized in this work. Tungstite was synthesized by wet chemical route and tungsten oxide was derived by calcinating tungstite at elevated temperatures (723 K and 1023 K). The crystal structures of tungstite and tungsten oxide were confirmed from X-ray diffraction analysis. The UV photo responsive behavior of the tungstite and tungsten oxide decorated MWCNT UV photodetectors were studied using 365 nm UV LED array in the intensity range 15–83 μW cm−2. The device showed good UV photoresponsivity with high external quantum efficiency (EQE). Tungstite decorated MWCNT UV photodetector exhibited maximum responsivity of 7.4 AW−1 along with EQE of 2550% under the incident UV intensity of 15 μW cm−2. Up to 500 Hz optical chopping frequency, the devices showed remarkable stability along with good repeatability of UV detection. Response and recovery time is recorded as low as 400 μs and 500 μs respectively for tungstite decorated UV photodetectors.

KW - MWCNT

KW - Recovery time

KW - Response time

KW - Tungsten oxide

KW - Tungstite

KW - UV photodetector

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DO - 10.1007/s42452-019-1799-z

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Expeditious UV detection of tungstite (WO₃·H₂O) and tungsten oxide (WO₃) decorated multiwall carbon nanotubes (MWCNT) based photodetector: ultrafast response and recovery time

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Keywords

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