Unraveling the effect of Gd doping on the structural, optical, and magnetic properties of ZnO based diluted magnetic semiconductor nanorods

Obeid, Mohammed M.; Jappor, Hamad Rahman; Al-Marzoki, Kutaiba; Disher, Imad A.; Edrees, Shaker J.; Shukur, Majid M.

doi:10.1039/c9ra04750f

Cited by 142 publications

(77 citation statements)

References 109 publications

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“…These parameters along with the occupancy of the atoms are listed in Table 2. The values of these parameters indicate that derived samples are of high quality, and refinements are effective [5]. Observed and calculated values were good matching as can be recognized from figures.…”

Section: Structural Analysissupporting

confidence: 60%

“…It is obvious from the scattered points in Figure 4 that the data do not fully obey the W-H formulation for different samples, where they demonstrate a non-monotonous increase of β cos θ versus 4sin θ. This indicates that the broadening of Bragg peaks with respect to different Bragg reflections are anisotropic and triggered by anisotropic microstrain [5]. Thus, the microstrain anisotropy observed in these nanoparticles is attributed to the occurrence of point defects.…”

Section: Structural Analysismentioning

confidence: 89%

“…Williamson-Hall (W-H) plot delivers information about crystallite size and lattice strain. Therefore, W-H plot was adopted to estimate the lattice strain and crystallite size through the following relation [5]:…”

Section: Structural Analysismentioning

confidence: 99%

“…One may also observe that crystallite size from XRD line profiles is smaller than the particle size achieved from TEM analysis. This is related to the agglomeration of lots of small domains to form a particle [5].…”

Section: Structural Analysismentioning

confidence: 99%

“…This field of science has the potential to breakthrough many applications such as electric and electronic devices, catalysts, optical, magnetic, and biomedical devices [1][2][3]. On the account of their excellent physicochemical features, high surface area to volume ratio, and distinctive nanosize structure, metal oxides nanomaterials such as TiO2, ZnO, CuO, and MgO is being increasingly applied as an alternative agent in different applications [4,5]. In the last decades, many studies on the preparation of metal oxides nanocrystals with large surface area and high reactivity have been offered [6].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Transition Metals Incorporation on the Structural and Magnetic Properties of Magnesium Oxide Nanoparticles

Hanish

Edrees

Shukur

2020

IJE

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Pure and doped magnesium oxide nanoparticles were successfully synthesized employing a sol-gel process. The synthesized nanoparticles were characterized by thermal differential analysis, X-ray powder diffraction, transmission electron microscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy, and vibrating sample magnetometer. X-ray diffraction patterns confirmed the crystallization of MgO structure and correspondingly ratified that the transition metal atoms were incorporated into the MgO host lattice. The crystallite size decreases as the concentration of dopants were augmented. TEM images showed that the particles of pristine magnesium oxide were embedded in the sheet matrix of the graphene-like layer with a size of 22.06 nm. The EDS spectra revealed the presence of carbon in pure MgO nanoparticles, while nickel and chromium were distributed in the host lattice. Based on VSM measurements, room temperature ferromagnetism in pristine MgO-NPs could be ascribed to the presence of either Mg vacancy or carbon atoms. Furthermore, paramagnetic ordering had been observed upon doping. Overall, the prepared MgO-NPs may be found as a potential application in spintronics devices.

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Section: Structural Analysissupporting

confidence: 60%

Section: Structural Analysismentioning

confidence: 89%

Section: Structural Analysismentioning

confidence: 99%

Section: Structural Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Transition Metals Incorporation on the Structural and Magnetic Properties of Magnesium Oxide Nanoparticles

Hanish

Edrees

Shukur

2020

IJE

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Impact of Structural Strain on Performance of Halide Perovskite Solar Cells: A Combined DFT and SCAPS‐1D Analysis

Yadav,

Bhojani,

Bhargava

et al. 2024

Advcd Theory and Sims

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The halide perovskites have received extensive experimental and theoretical research interests for photovoltaic application. Most of the theoretical research is based on either material or device modeling approaches. However, literature is still deprived of studies based on the combination of these approaches, which are expected to yield predictions with superior accuracy. This report combines the first‐principles density functional theory (DFT) computations and device modeling to understand the impact of structural strain, generally induced during the crystallization phase of perovskite materials, on the photovoltaic performance of methyl ammonium lead halide (CH3NH3PbI3 or MAPbI3) based solar cell. The magnitude of strain varies in the range from +2% (tensile) to −2% (compressive). The impact of strain is analyzed in terms of the variations in band structure and values of optoelectronic parameters obtained using DFT calculations and further, their impact on performance metrics of solar cells is predicted using device simulations. The optimized cell efficiency under strain‐free conditions is 13% while it deteriorated to 1.6% under +2% tensile strain and improved to 22.3% under compressive strain. The simulation results underline the importance of engineering the structural strain during the crystallization of perovskite absorber material to achieve solar photovoltaic cells of high efficiency.

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Noninvasive treatment of psoriasis and skin rejuvenation using an akermanite‐type narrowband emitting phosphor

et al. 2023

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Psoriasis is a noncontagious, long‐lasting skin infection that affects many people around the world. Numerous therapeutic artificial treatments are available for the treatment of psoriasis, such as photodynamic therapy using broadband ultraviolet (UV) lamps, which have harmful effects on human skin. Similarly, the natural healing systems such as sunlight have a higher risk of sunburn and can cause dangerous forms of skin cancer. Significant light emission of a specific wavelength (in the UV range), and phosphor‐based devices demonstrate the effectiveness of treating psoriasis without damaging the skin. Gd3+‐doped calcium magnesium silicate [Ca2MgSi2O7:Gd3+,(CMS:Gd3+)] phosphor is one of the ideal phosphors that emit specific narrow UV wavelengths for curing psoriasis and is in great demand in the field of dermatology. Photoluminescence analysis at room temperature (~25°C) shows that the synthesized CMS:Gd3+ phosphor emits narrowband UV‐B light with a peak intensity at 314 nm. Comparative studies of the standard action spectrum of psoriasis with the emission spectrum of the CMS:Gd3+ phosphor show that the synthesized phosphor was the most suitable material for treating a variety of diseases, including psoriasis, vitiligo, type‐1 diabetes, dental disease, sleep and mood disorders, and other skin diseases.

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Unraveling the effect of Gd doping on the structural, optical, and magnetic properties of ZnO based diluted magnetic semiconductor nanorods

Abstract: Gd doped ZnO nanorods.

Cited by 142 publications

References 109 publications

The Effect of Transition Metals Incorporation on the Structural and Magnetic Properties of Magnesium Oxide Nanoparticles

The Effect of Transition Metals Incorporation on the Structural and Magnetic Properties of Magnesium Oxide Nanoparticles

Impact of Structural Strain on Performance of Halide Perovskite Solar Cells: A Combined DFT and SCAPS‐1D Analysis

Noninvasive treatment of psoriasis and skin rejuvenation using an akermanite‐type narrowband emitting phosphor

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