Fabrication and Performance of UV Photodetector of ZnO Nanorods Decorated with Al Nanoparticles

Shang, Shuo; Dong, Yunpeng; Zhang, Wenqian; Ren, Wei

doi:10.3390/nano12213768

Cited by 13 publications

(8 citation statements)

References 32 publications

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“…Plasmonic nanoparticles such as Al also tend to increase the sensitivity of the ZnO nanorod photodetector. For example, compared to bare ZnO nanorods, devices with plasmonic Al nanoparticles show increase in their responsivity from 53 to 267 mA W −1 and in their sensitivity from 9.5 to 47.8 under 325 nm UV light (5 mW cm −2 ) at 3.0 V bias [63]. In addition, Liu et al demonstrated that photoresponse of ZnO nanorods can be enhanced by covering it with a polymer such as PMMA.…”

Section: Electrical and Optoelectrical Properties Of Zno Nanorodsmentioning

confidence: 99%

Relevance of alcoholic solvents in the growth of ZnO nanoparticles and ZnO hierarchical nanorod structures on their optical and opto-electrical properties

Nagpal,

Rauwel,

Ducroquet

et al. 2023

Nanotechnology

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We report on the synthesis of ZnO nanoparticles and ZnO hierarchical nanorod structures using four different alcohols i.e., methanol, isopropanol, ethanol, and aqueous ethanol (70% alcohol, 30% water). The syntheses of the nanoparticles were carried out by non-aqueous and hydrothermal routes. In general, absolute alcohol allows a better control of the synthesis reaction and nanoparticles as small as 5 nm were obtained, confirmed by TEM. XPS analysis elucidated the chemical states that were correlated to the synthesis reaction. For the nanorod growth, these four alcohols were used as seeding solvents, followed by hydrothermal ZnO nanorod growth. Here, the seed layer tailored the nanorod diameters and surface defects, which were studied by SEM and photoluminescence spectroscopy. Subsequently, The ZnO nanorods were electrically characterized and exhibited persistent photoconductivity under UV irradiation of 365nm. The differences in conductivity in dark and under UV irradiation were attributed to the size of the nanorods, defect states, semiconductor band bending and oxygen adsorption-desorption mechanisms. Parameters such as photoresponse and photosensitivity are also calculated in order to evaluate their applicability in UV sensors. This work demonstrates optimization of the physical, chemical, electrical and optical properties of both ZnO nanostructures via the use of alcoholic solvents.

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Section: Electrical and Optoelectrical Properties Of Zno Nanorodsmentioning

confidence: 99%

Relevance of alcoholic solvents in the growth of ZnO nanoparticles and ZnO hierarchical nanorod structures on their optical and opto-electrical properties

Nagpal,

Rauwel,

Ducroquet

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…The last decade has witnessed the rapid progress of optoelectronic devices owing to their crucial impact on several industries, such as light images in cameras, controlling the intensity of street lighting, spaceships, military laser equipment, and highly technology controlled windows, imaging, UV radiation monitoring, and wearable devices [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Among these devices, photodetectors must be suitable for various fields.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, photodetectors display outstanding detection ability covering a broad spectral range. Such a device is highly dependent on the activated photons reaching its surface, which will produce free electrons able to polarize the surface and induce a current density (J ph ) [ 4 , 5 ]. For the majority of recent semiconductors, this is directly proportional to light intensity, where the elevation of the photon flux liberates more electrons on the surface.…”

Section: Introductionmentioning

confidence: 99%

Photodetection Enhancement via Graphene Oxide Deposition on Poly 3-Methyl Aniline

et al. 2023

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A graphene oxide (GO)/poly 3-methyl aniline (P3MA) photodetector has been developed for light detection in a broad optical region: UV, Vis, and IR. The 3-methyl aniline was initially synthesized via radical polymerization using an acid medium, i.e., K2S2O8 oxidant. Consequently, the GO/P3MA composite was obtained through the adsorption of GO into the surface of P3MA. The chemical structure and optical properties of the prepared materials have been illustrated via XRD, FTIR, SEM, and TEM analysis. The absorbance measurements demonstrate good optical properties in the UV, Vis, and near-IR regions, although a decrease in the bandgap from 2.4 to 1.6 eV after the composite formation was located. The current density (Jph) varies between 0.29 and 0.68 mA·cm−2 (at 2.0 V) under dark and light, respectively. The photodetector has been tested using on/off chopped light at a low potential, in which the produced Jph values decrease from 0.14 to 0.04 µA·cm−2, respectively. The GO/P3MA photodetector exhibits excellent R (and D) values of 4 and 2.7 mA·W−1 (0.90 × 109 and 0.60 × 109 Jones) in the UV (340 nm) and IR (730 nm) regions, respectively. The R and D values obtained here make the prepared photodetector a promising candidate for future light detection instruments.

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“…ZnO has been utilized extensively as a wide-band-gap semiconductor. It is also a versatile material with a wide range of different shapes as well as morphologies, such as nanosprings, nanocombs, nanobelts, nanocages, and nanowires [ 18 , 19 , 20 , 21 , 22 ]. Compared to other noble metals (Au/Pt), silver (Ag) nanoparticles exhibit unique characteristics, including biocompatibility, excellent catalytic activity, low toxicity, antibacterial qualities, and affordability, and, hence, they were chosen in our study to decorate ZnO NRs [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Ag-Decorated Vertically Aligned ZnO Nanorods for Non-Enzymatic Glucose Sensor Applications

et al. 2023

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The non-enzymatic glucose sensing response of pure and Ag-decorated vertically aligned ZnO nanorods grown on Si substrates was investigated. The simple low-temperature hydrothermal method was employed to synthesize the ZnO NRs on the Si substrates, and then Ag decoration was achieved by sputtering. The crystal structure and surface morphologies were characterized by X-ray diffraction, field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). The Ag incorporation on the ZnO NR surfaces was confirmed using EDS mapping and spectra. Furthermore, the chemical states, the variation in oxygen vacancies, and the surface modifications of Ag@ZnO were investigated by XPS analysis. Both the glucose/ZnO/Si and glucose/Ag@ZnO/Si device structures were investigated for their non-enzymatic glucose sensing performances with different glucose concentrations. Based on EIS measurements and amperometric analysis, the Ag@ZnO-NR-based glucose sensor device exhibited a better sensing ability with excellent stability over time than pure ZnO NRs. The Ag@ZnO NR glucose sensor device recorded 2792 µA/(mM·cm2) sensitivity with a lowest detection limit of 1.29 µM.

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Fabrication and Performance of UV Photodetector of ZnO Nanorods Decorated with Al Nanoparticles

Cited by 13 publications

References 32 publications

Relevance of alcoholic solvents in the growth of ZnO nanoparticles and ZnO hierarchical nanorod structures on their optical and opto-electrical properties

Relevance of alcoholic solvents in the growth of ZnO nanoparticles and ZnO hierarchical nanorod structures on their optical and opto-electrical properties

Photodetection Enhancement via Graphene Oxide Deposition on Poly 3-Methyl Aniline

Ag-Decorated Vertically Aligned ZnO Nanorods for Non-Enzymatic Glucose Sensor Applications

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