Structural and optical characterization of Zn0.95−xMg0.05AlxO nanoparticles

Mallika, A. N.; Reddy, A. Ramachandra; SowriBabu, K.; Reddy, K. Venugopal

doi:10.1016/j.ceramint.2015.03.096

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…As shown in Figure , ZnS buffer layer grown on the multinanoheterostructures further decreases the PL intensity. The green emission is endorsed to the near-band-edge emission of CdS and CdTeS, associated with the free-exciton recombination in CdS and CdTeS at room temperature . The PL emission spectra of all these samples sensitized with different QDs on the surface of ZZ show that the optical properties are extremely sensitive to their defects densities and morphology.…”

Section: Resultsmentioning

confidence: 93%

“…The photoluminescence (PL) spectra of different samples were measured at 25 °C, by using a xenon lamp with 325 nm excitation wavelengths and the results are shown in Figure . The ZnO PL spectrum consists of two parts, i.e., excitonic near band edge emission and the defects related deep level emission on the visible region . The ZnO has UV excitonic emission peak exhibiting visible luminescence due to extrinsic and intrinsic defects.…”

Section: Resultsmentioning

confidence: 99%

“…This may arise due to the synthesis procedure of ZnO nanoflowers and to the complex nanostructure. The ZnO UV emission depends on some different factors, i.e., the direct transition from conduction band to valence band, transition of zinc interstitial (Zn i ) defect level to valence band, transition from the conduction band to zinc vacancy (V Zn ) which is a result of blue–green emission of the material, and transition from Zn i to V Zn . The ZnO nanoflowers have a stronger emission peak at 390 nm and can be ascribed to band-to-band transition.…”

Section: Resultsmentioning

confidence: 99%

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Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Ali

Song

et al. 2017

J. Phys. Chem. C

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We prepared novel photoanodes structured as FTO/ZnO nanoflowers/ZnTiO3/CdS/CdTeS/ZnS quantum dots (QDs) with highly exposed large specific area and energy coupling. The design of the photoanode expressed significant enhanced photoelectrochemical (PEC) performance such as improved absorption efficiency, reduced recombination rate, and enhanced charge transportation state, resulting in a significant increase in photoelectron current. The multinanoheterostructures photoanode provides a high photocatalytic activity and a maximum photocurrent density up to 9.41 mA/cm2 under AM 1.5 G illumination. The novel cosensitized multinanoheterostructures photoanodes lead to a remarkable and promising application in photoelectrochemical and water splitting reactions.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Ali

Song

et al. 2017

J. Phys. Chem. C

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“…Based on the standard data on JCPDS card No. 36 -1451) all these data remark the structure matrix of Zinc oxide, ZnO, in other words, each sample has a pure hexagonal structure with well-developed crystallinity, where Al 3+ ions were substituted into the sites of Zn 2+ ions and/or incorporated into interstitial sites in the lattice without altering the hexagonal structure of ZnO [22]. it was observed when the content of Al 3+ increased above 6% the positions of the crystalline phases/peaks exhibit a slight shift towards the higher diffraction's angle 2θ°, which may be attributed to the lattice shrinkage caused by the replacing of the Zn2+ (radius 0.74 Å) by Al3+ (radius 0.53 Å) [23][24][25][26].…”

Section: Structural Phase Identificationmentioning

confidence: 95%

Structural, Linear and Nonlinear Optical Properties of Some Al-free and Al-doped ZnO Nanopowder Samples

Moussa

Ebrahim

Gomaa

et al. 2021

Preprint

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This research work aims to prepare and characterization some Al-doped ZnO nanoparticles. The co-precipitation method was used for preparing the desired samples, where ZnO replaced by AlCl3. Then the resulted materials were characterized and their structural phases identified using the XRD technique, where eight crystalline phases were identified and then assigned to some of the interatomic planes, (100), (002), (101), (102), (110), (103), (112), and (201). Both the average crystalline size and the micro-strain were calculated for each sample, where it was found that both of them increase when Ai-content increases. UV-vis spectra showed an absorption peak centered at 3.34 eV which represents the optical bandgap of ZnO. Al-Impurities acted to improve and increase the value of the optical transmittance, especially in the visible light region. The increase of Al-content influenced, where their values increase when AL-content increases. the value of the calculated nonlinear refractive index may be considered promising for different optoelectronic applications.

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“…112) and (201) planes, respectively. Hexagonal wurtzite structure of ZnO formation examined clearly form the intense peaks in the XRD pattern of these samples [17]. Without altering the hexagonal wurtzite structure of ZnO, Mg 2?…”

Section: Introductionmentioning

confidence: 98%

Structural and optical characterization of Zn0.95−xMg0.05CuxO nanoparticles

Mallika

Reddy

2015

J Mater Sci: Mater Electron

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In the present paper, Mg and Cu co-doped ZnO nanoparticles (Zn 0.95-x Mg 0.05 Cu x O) synthesized using SolGel method and their structural, optical properties were studied. Hexagonal wurtzite structure of ZnO was confirmed from XRD results. With Cu doping CuO related phase was formed without altering the crystal structure. The average crystallite size of ZnO decreased with increase of Mg and Cu co-doping. TEM results confirmed the nano size crystalline nature of ZnO nanoparticles. From FE-SEM micrographs, the particle sizes decreased and the morphology became less hexagonal with increase of Cu concentrations along with Mg in ZnO. The weaker and broadened E 2 (high) mode in Raman with increase of Cu doping concentrations may be attributed to wurtzite crystalline structure of ZnO is weakened. Thus, resulting to reduction of the growth induced strains which in good agreement with XRD results. From UV-Vis analysis, fundamental exciton absorption is observed at 377 nm for undoped ZnO. With addition of the dopants (Mg, Cu) the peak got blue shifted from 377 to 355 nm. The blueshift was attributed to the strains produced with dopants but not due to quantum confinement effect due to the sizes of the particles are not comparable of the Bohr atomic radius.

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Structural and optical characterization of Zn0.95−xMg0.05AlxO nanoparticles

Cited by 11 publications

References 45 publications

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Structural, Linear and Nonlinear Optical Properties of Some Al-free and Al-doped ZnO Nanopowder Samples

Structural and optical characterization of Zn0.95−xMg0.05CuxO nanoparticles

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Structural and optical characterization of Zn0.95−xMg0.05AlxO nanoparticles

Cited by 11 publications

References 45 publications

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO3 Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO3 Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Structural, Linear and Nonlinear Optical Properties of Some Al-free and Al-doped ZnO Nanopowder Samples

Structural and optical characterization of Zn0.95−xMg0.05CuxO nanoparticles

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Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting

Nature-Mimic ZnO Nanoflowers Architecture: Chalcogenide Quantum Dots Coupling with ZnO/ZnTiO₃ Nanoheterostructures for Efficient Photoelectrochemical Water Splitting