Correlation of enhanced photocurrent with structural and optical properties of Ag–ZnO nanocomposites synthesized by a facile chemical route

Pandey, Prashant; Chauhan, Vaibhav; Dixit, Prashant; Pandey, Praveen C.

doi:10.1016/j.physb.2021.412937

Cited by 19 publications

(11 citation statements)

References 40 publications

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“…88 Pandey et al fabricated an Ag/ZnO nanocomposite that showed a 3-fold increase in responsivity compared to bare ZnO. 89 Hence, optimizing the atomic percentage and choosing the right dopant significantly improve the crystallinity and passivation of the surface defect states and can tune the band gap for the desired absorption and, in turn, contributes to enhancement in the interaction of light with the ZnO photoactive material. 90…”

Section: Nanostructured Zno-based Uv Pdsmentioning

confidence: 99%

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Madhavanunni Rekha,

Vadakke Neelamana,

Bhat

2023

ACS Appl. Electron. Mater.

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Zinc oxide (ZnO) is versatile among semiconducting metal oxides with properties such as high photosensitivity, highly tunable specific surface area, nontoxicity, piezoelectricity, almost 85% optical transparency in the visible region, large exciton binding energy, and good biocompatibility. ZnO also shows excellent chemical and thermal stability. This n-type semiconducting material finds several applications in optoelectronic devices such as photodetectors (PDs) due to its wide and direct band gap. Beyond these, the nanostructured ZnO shows unique and tunable properties suitable for flexible and wearable devices. Recently, solution-based deposition techniques have achieved device-quality films at a low cost. This is mainly because the ease of intermixing and controlling the stoichiometry of the precursors is possible with a variety of solution-based synthesis methods, unlike physical deposition methods. This review summarizes the recent developments related to solutionderived ZnO-based thin films for ultraviolet (UV) detector applications. The different strategies used for the fabrication of UV detectors, major improvements achieved with solution-processed ZnO thin films of different morphologies, and their UV photoresponse behavior while in conjugation with other potential materials are discussed in this Review. However, a few shortcomings of the solution-based ZnO thin films, such as low quality and high defect density, remain challenges for the advancement of UV PD application. Thus, this Review concludes with a brief overview of such challenges and an outlook on the emerging research directions toward improving the capabilities of solution-processed ZnO-based UV detectors for various purposes.

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Section: Nanostructured Zno-based Uv Pdsmentioning

confidence: 99%

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Madhavanunni Rekha,

Vadakke Neelamana,

Bhat

2023

ACS Appl. Electron. Mater.

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“…As observed, the spectrum composed of the main elements Zn, Cr, and O only with atomic percent (at.%) 58.67, 8.86, and 32.47 respectively, which is consistent with the starting composition. The presence of chromium (Cr) in the spectrum clearly supports the successful integration chemical reaction and formation of zinc chromium oxide compound with pure phase [ 34 ]. For further microstructure analysis, SEM micrograph was done to visualize the surface topology and shape of the nanoparticles.…”

Section: Resultsmentioning

confidence: 98%

“…As depicted in Fig. 2 b, the particles are distributed in nanosphere/hexagonal like structures, where some of them agglomerated together [ 30 , 34 ]. Besides, the mean size of the nanospheres was estimated from the TEM image to be around 25 nm (Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultrastructural changes in the fat body of desert locust, Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide nanostructures via chemical co-precipitation approach

2023

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The present work aims to investigate the ultrastructural changes in the fat body of fifth instar nymphs Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide (ZnCrO). The nanoparticles (NPs) were prepared by co-precipitation route and characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The ZnCrO NPs exhibited polycrystalline hexagonal structure, composed of spherical–hexagonal shapes with an average size ~ 25 nm. Besides, the UV–Vis spectrophotometer (Jasco-V-570) was utilized for optical measurements. The energy gap $$\left( {{\text{E}}_{{\text{g}}} } \right)$$ E g was estimated from the transmittance (T%) and reflectance (R%) spectra through the range of 3.307–3.840 eV. In biological sections, S. gregaria 5th instar nymphs, TEM images demonstrated that the fat body was strongly impacted with the concentration 2 mg NPs result in great agglomeration of chromatin in the nucleus as well as haemoglobin cells (HGCs) pierced with malformed trachea (Tr) at 5th and 7th days post treatment. The obtained results indicated a positive action of the prepared nanomaterial on Schistocerca gregaria fat body organelles. Graphical Abstract

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“…2b), the particles are distributed in nanosphere and hexagonal shapes. However, some of the particles agglomerate together, suggesting the large surface area of ZnCrO [25,29]. The mean size of the particles distribution of Cr-doped ZnO was evaluated from the TEM image to be approximately 25 nm as described in (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…It was observed that the spectrum was composed of Zn, Cr, and O only. The presence of Cr in the spectrum clearly supports the successful incorporation process and formation of zinc chromium oxide in the pure phase(Pandey et al 2021; Qi et al 2019). The atomic percent of the elements Zn, O, and…”

mentioning

confidence: 79%

An ultrastructural change in the fat body of Desert Locust Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide nanostructures via facile chemical coprecipitation

Hashem

Elgazzar

Mostafa

2022

Preprint

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Background The present work aims to investigate the ultrastructural changes in the fat body of fifth nymphal instars Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide (ZnCrO). Methodology: The nanoparticles (NPs) were prepared by a coprecipitation approach. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed to investigate the structural, composition, and morphological properties. Results and discussion The ZnCrO NPs exhibited a hexagonal polycrystalline structure. SEM and TEM micrographs described the surface nature of the nanoparticles composed of spherical and hexagonal shapes with an average size of ~25 nm. The energy gap (Eg)of the Cr-doped ZnO thin film was estimated from the transmittance and reflectance spectra to be 3.307 and 3.840 eV. In biological sections, TEM images demonstrated that the fat body strongly impacted with the concentrations 2mg of the treated nanoparticles caused great agglomerated chromatin in the nucleus as well as haemoglobin cells (HGCs) pierced with malformed trachea. In addition, the same effect was observed at 1mg on the 7th day post treatment Conclusion The results indicate a positive impact of ZnCrO on Schistocerca gregaria leads to malformed of fat body organelles.

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Correlation of enhanced photocurrent with structural and optical properties of Ag–ZnO nanocomposites synthesized by a facile chemical route

Cited by 19 publications

References 40 publications

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Ultrastructural changes in the fat body of desert locust, Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide nanostructures via chemical co-precipitation approach

An ultrastructural change in the fat body of Desert Locust Schistocerca gregaria (Orthoptera: Acrididae) treated with zinc chromium oxide nanostructures via facile chemical coprecipitation

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