Facile synthesis and enhanced luminescence behavior of ZnO:Reduced graphene oxide(rGO) hybrid nanostructures

Jayalakshmi, G.; Saravanan, K.; Pradhan, Jagnaseni; Magudapathy, P.; Panigrahi, B. K.

doi:10.1016/j.jlumin.2018.06.023

Cited by 42 publications

(10 citation statements)

References 41 publications

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“…Moreover, several researchers have reported the phenomenon that near zero band gap semiconductors enhance the PL performance of ZnO. This result suggests that the PL-enhancing properties of near zero band gap materials with ZnO can be investigated in more detail. , …”

Section: Resultsmentioning

confidence: 95%

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Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method

Liu

2020

Inorg. Chem.

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This paper reports on a near zero band gap semiconductor, Ni x S y , which significantly enhances the photoluminescence (PL) performance of ZnO nanorods. The structural, morphological, and optical properties of the composites were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), ultraviolet–visible spectroscopy (UV–vis), PL spectrometry, etc. The PL patterns at an excitation wavelength (λex) of 325 nm revealed that the 10% Ni x S y /ZnO nanorod (10NZNR) composites displayed the highest emission intensity in the region of 420–630 nm. The relationship between the emission intensity of ZnO and the concentration of Ni x S y demonstrated that the PL intensity of NZNRs initially increased (<10%) and then declined with an increase in Ni x S y content (>10%). According to PL spectra at different excitation wavelengths and PL excitation (PLE) spectra, the visible emission of Ni x S y /ZnO nanorod (NZNR) composites can only be excited by light with energy greater than that of the band gap. Studies of the morphological structures and PL behaviors of NZNR composites have illustrated that Ni x S y considerably enhances the visible emission of ZnO by regulating its morphology and structure. An appropriate mechanism by which Ni x S y enhances the PL performance of ZnO has been proposed.

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Section: Resultsmentioning

confidence: 95%

“…This result suggests that the PL-enhancing properties of near zero band gap materials with ZnO can be investigated in more detail. 15,40…”

Section: Methodsmentioning

confidence: 99%

Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method

Liu

2020

Inorg. Chem.

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“…Therefore, it only showed a slight shoulder peak at approximately 18°, indicating that the PEICT nanofiber is amorphous. On the other hand, the XRD pattern of the ZnO nanoparticle sample exhibited clear crystalline peaks at 2θ values of 31.76°, 34.51°, 36.33°, 47.69°, 56.86°, 63.10°, 66.68°, 68.22°, and 69.32°, which correspond to the (100), (002), (101), (102), (110), (103), (200), (112), and (201) planes of the hexagonal wurtzite structure of ZnO [ 31 ]. It was found that there was no significant shift in the peak position of ZnO upon the adsorption on the PEICT nanofiber surface, indicating that the ZnO nanoparticles were not only well-distributed in the PEICT nanofiber mat, but the crystal structure of the ZnO nanoparticle was also preserved during nanoparticle loading by the immersion process with post-electrospinning solvent treatment.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of ZnO Nanoparticle-Decorated Nanofiber Mat with High Uniformity Protected by Constructing Tri-Layer Structure

Phan

Choi²,

et al. 2020

Polymers

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We demonstrate a sequential electrospinning process involving the adsorption of ZnO nanoparticles on the surface of bio-based polyester, which is a terpolyester of a renewable isosorbide (ISB) monomer, ethylene glycol, 1,4-cyclohexane dimethanol, and terephthalic acid, the-so-called PEICT, to fabricate stable ZnO nanoparticles/PEICT nanofiber composite system protected with other two PEICT nanofiber mats. We found that post-electrospinning treatment with a particular solvent was effective to remove a residual solvent molecule in the PEICT nanofibers, which induced significant aggregation of the nanoparticles, leading to non-uniform distribution of the particles on the surface. Sequential electrospinning of the PEICT solution to sandwich ZnO nanoparticle-decorated PEICT nanofiber mat enabled to attain protected the inorganic/organic hybrid nanofiber mat, improving the long-term stability, and the reproducibility of the inorganic particles decorated nanofiber fabrication.

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“…This peak is located at around 366.68 nm for the distances of 20 and 30 cm, which is corresponding to 3.38 Ev of energy band, while it is located at 368 nm for the distance of 25 cm, which is corresponding to 3.36 Ev. The other peak is positioned at the visible zone that is connected to the defects within the NiO crystal such as oxygen vacancies, oxygen interstitial, and Ni interstitial, these defects could act as the trappers for the electrons [49,50].…”

Section: Photoluminescencementioning

confidence: 99%

Influence of the distance between nozzle and substrate on the structural, photoluminescence, and detector characteristics of p-NiO/n-Si hetero-junction deposited by spray pyrolysis method

2022

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In the present investigation, p-NiO has been deposited on n-Si (100) substrate by the spray pyrolysis method. The effect of the distance between the substrate and the nozzle on the structural, photoluminescence, and detection properties has been well inspected. XRD analysis proved the polycrystalline system with a cubic structure for NiO. The elemental analysis con rmed the existence of Ni, O, and Si materials without any impurities. The FESEM analysis showed nano and micro particles distributed on the Si layer, the micro particles have porous like structures which play a signi cant role as photons guider. The photoluminescence measurement depicted three main peaks at the UV and visible regions of the electromagnetic spectrum which are related to near band edge emission and defects within the crystal, respectively. I-V characteristics revealed good conductivity under UV illumination, and the highest current was recorded by a sample when the distance between the nozzle and the substrate is 25 cm. The responsivity elucidated a high value at UV region with 6.5 mA/W, and the current-time properties demonstrated good reproducibility, high stability and photoresponse, and rapid response and recovery times of 0.375 and 0.791 s, respectively at a lower bias voltage of 1.5 Volt under UV photons source.

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Facile synthesis and enhanced luminescence behavior of ZnO:Reduced graphene oxide(rGO) hybrid nanostructures

Cited by 42 publications

References 41 publications

Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method

Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method

Fabrication of ZnO Nanoparticle-Decorated Nanofiber Mat with High Uniformity Protected by Constructing Tri-Layer Structure

Influence of the distance between nozzle and substrate on the structural, photoluminescence, and detector characteristics of p-NiO/n-Si hetero-junction deposited by spray pyrolysis method

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Facile synthesis and enhanced luminescence behavior of ZnO:Reduced graphene oxide(rGO) hybrid nanostructures

Cited by 42 publications

References 41 publications

Significantly Enhanced Photoluminescence Performance of NixSy(NiS and Ni9S8)/ZnO Nanorods by a Hydrothermal Method

Significantly Enhanced Photoluminescence Performance of NixSy(NiS and Ni9S8)/ZnO Nanorods by a Hydrothermal Method

Fabrication of ZnO Nanoparticle-Decorated Nanofiber Mat with High Uniformity Protected by Constructing Tri-Layer Structure

Influence of the distance between nozzle and substrate on the structural, photoluminescence, and detector characteristics of p-NiO/n-Si hetero-junction deposited by spray pyrolysis method

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Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method

Significantly Enhanced Photoluminescence Performance of Ni_xS_y(NiS and Ni₉S₈)/ZnO Nanorods by a Hydrothermal Method