ZnO nanorod and rGO based nanocomposite decorated with Au nanoparticles for enhanced UV&#x00A0;photodetection

Deepjyoti Chetry; Pritymala Basumatary; Karen Das; Priyanka Kakoty

doi:10.1364/JOSAB.504063

Journal of the Optical Society of America B
Vol. 40,
Issue 12,
pp. 3096-3103
(2023)
•https://doi.org/10.1364/JOSAB.504063

ZnO nanorod and rGO based nanocomposite decorated with Au nanoparticles for enhanced UV photodetection

Deepjyoti Chetry, Pritymala Basumatary, Karen Das, and Priyanka Kakoty

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Deepjyoti Chetry, Pritymala Basumatary, Karen Das, and Priyanka Kakoty, "ZnO nanorod and rGO based nanocomposite decorated with Au nanoparticles for enhanced UV photodetection," J. Opt. Soc. Am. B 40, 3096-3103 (2023)

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- Optical Materials
Optics & Photonics Topics
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About this Article
History
- Original Manuscript: August 23, 2023
- Revised Manuscript: October 19, 2023
- Manuscript Accepted: October 19, 2023
- Published: November 13, 2023

Abstract

A comprehensive analysis of a hydrothermally prepared Au nanoparticle decorated nanocomposite of reduced graphene oxide (rGO) and a ZnO nanorod (NR) for possible use as a UV photodetector is presented. The effect of rGO loading in ZnO and incorporation of Au decoration in the best combination of rGO/ZnO for possible enhancement of a photocatalytic effect are experimented. X-ray diffraction, scanning electron microscopy, energy diffraction, and UV-Vis spectroscopy are done for morphological, structural, and optical attribute analysis of the prepared materials. An increase in photocurrent is seen from 2.19 nA to 6.14 mA in dark and UV environments (370 nm) at 5 V bias voltage for the Au decorated nanocomposite, which is found to be better among the experimented composites. The responsivity and detectivity of the Au decorated nanocomposite are analyzed with the increase in incident UV light intensities. The findings are analyzed, and an explanation of the detailed UV photodetection mechanism is outlined in this paper.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Materials	Responsivity (A/W)	Detectivity (Jones)	Response Time	Wavelength (nm)	Bias Voltage	Refs.
${T i O}_{2} - r G O$ (2.60 wt. %)	7.71	$7.92 \times 10^{13}$	43 ms	370	5 V	[1]
ZnO and PEDOT:PSS	0.403	$32.246 \times 10^{7}$	187.46 s	360	5 V	[21]
Al-doped ZnO (3 wt. %)	1.983	—	4 s	365	5 V	[22]
Ag in $Z n O A u / M g Z n O / {S i O}_{2}$	9.33		—	365	20 V	[23]
Ag/ZnO nano-needle	24.64	—	9.58 s	365	5 V	[24]
Li-doped ZnO NR	34.87	—	—	380	5 V	[25]
ZnO:Nd (6%)	0.73	$1.18 \times 10^{11}$	0.3 s	370	5 V	[26]
Y-doped ZnO nanowires	0.225	—	$< 1 s$	374	5 V	[27]
Cu doped ZnO	40.12	$1.24 \times 10^{10}$	0.8 s	375	1 V	[28]
Au decorated ZnO NR/rGO	41.3	$1.5 \times 10^{15}$	2.5 s	370	5 V	This work

Materials	Responsivity (A/W)	Detectivity (Jones)	Response Time	Wavelength (nm)	Bias Voltage	Refs.
${T i O}_{2} - r G O$ (2.60 wt. %)	7.71	$7.92 \times 10^{13}$	43 ms	370	5 V	[1]
ZnO and PEDOT:PSS	0.403	$32.246 \times 10^{7}$	187.46 s	360	5 V	[21]
Al-doped ZnO (3 wt. %)	1.983	—	4 s	365	5 V	[22]
Ag in $Z n O A u / M g Z n O / {S i O}_{2}$	9.33		—	365	20 V	[23]
Ag/ZnO nano-needle	24.64	—	9.58 s	365	5 V	[24]
Li-doped ZnO NR	34.87	—	—	380	5 V	[25]
ZnO:Nd (6%)	0.73	$1.18 \times 10^{11}$	0.3 s	370	5 V	[26]
Y-doped ZnO nanowires	0.225	—	$< 1 s$	374	5 V	[27]
Cu doped ZnO	40.12	$1.24 \times 10^{10}$	0.8 s	375	1 V	[28]
Au decorated ZnO NR/rGO	41.3	$1.5 \times 10^{15}$	2.5 s	370	5 V	This work

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Journal of the Optical Society of America B