Optical and structural properties of Mn doped MgO powders synthesized by Sol-gel process

Kettab, Ahmed; Mostefa, Rabah; Mahi, Khaled; Badaoui, M.; Mokhtar, Mebarek

doi:10.1016/j.ijleo.2016.06.055

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…Because, as the defect level in the structure increases, the scattering effect of the light will increase, which causes a decrease in the band gap. The band gap values obtained for MgO films are consistent with the studies in the cited literature (Ahmed et al, 2016;Güney & İskenderoğlu, 2018;Visweswaran et al, 2020;Taşer et al, 2021).…”

Section: Bulgular Ve Tartışmasupporting

confidence: 90%

“…The optical transmittance of the films increased from 93% to 97% at 600 nm as working pressure increased from 5mTorr to 10mTorr. The optical transmittance characteristic of materials is related to structural properties of the film such as homogeneity, crystal quality, film thickness and lattice defects such as deficiencies or vacancies (Nam & Han, 2003;Ahmed et al, 2016). In this study, the crystal quality increased with increasing working pressure and accordingly the transmittance increased.…”

Section: Bulgular Ve Tartışmamentioning

confidence: 62%

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Production of high-transparent MgO films by radio-frequency sputtering method

Şenaslan¹,

Çelik²,

Taşdemir³

2022

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Magnesium oxide (MgO) thin films were deposited on silicon and glass substrates by the radio frequency (RF) sputtering method. The MgO films were annealed at 400 ⁰C for 4h. The effect of working pressure on the structure and optical properties of MgO films was investigated. Structural characterization of thin films was determined using the X-ray diffraction (XRD) method. XRD results showed the presence of dominant peaks corresponding to the ( 200) and ( 220) lattice planes of MgO. However, peaks corresponding to ( 111), ( 311) and ( 222) lattice planes of the MgO also appeared in the films deposited at low pressure. It was determined that the average crystal size decreased as the working pressure reduced, while the deposition rate increased. SEM analysis showed that the microstructure of the nano-spherical MgO film transformed into a coarse-grained nano-pyramidal shape after annealing. The optical properties of MgO films were investigated by UV-Vis spectroscopy. Accordingly, it was determined that the absorption threshold of the films was around 310 nm wavelength and the optical band gap of the films varied between 4.07 and 4.14 eV. As a result, MgO films with high transmittance reaching an average of 95% in the visible region were obtained.

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Section: Bulgular Ve Tartışmasupporting

confidence: 90%

Section: Bulgular Ve Tartışmamentioning

confidence: 62%

Production of high-transparent MgO films by radio-frequency sputtering method

Şenaslan¹,

Çelik²,

Taşdemir³

2022

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…Magnesium oxide (MgO), one of many nanostructured MOs, has attracted significant interest due to its wide range of size and morphology, which enables it to be used in a variety of applications including optoelectronic devices, light-emitting diodes, piezoelectric devices, photodetectors, sensors, and wearable devices [9]. MgO is a cheap alkaline Earth metal oxide and it can be prepared by a large number of techniques including sol-gel, hydrothermal, chemical vapor deposition, and thermal evaporation [10]. Bulk MgO is highly insulting material which a very high optical bandgap of 7.8 eV, however, nanostructures of this material exhibit modified optical bandgap [11].…”

Section: Introductionmentioning

confidence: 99%

The synthesis of MgO and MgO-graphene nanocomposite materials and their diode and photodiode applications

Yıldırım

Daş

2023

Phys. Scr.

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The progress of modern life is largely based on technological developments. This is possible with the development of materials that increase the functionality of electronic devices. In this regard, the present work reports the synthesis of MgO and MgO-graphene (MgO-G) composite materials and their device applications. In the first step, MgO and MgO-G nanomaterials synthesis were carried out and then multiple approaches were used to characterize their structural, optical, and morphological properties as interfacial layer. In the next step, the MgO/n-Si and MgO-G/n-Si device structures were fabricated by using spin coating method. Finally, their diode and photodiode properties were investigated in the dark and under varied light energy. The dark current-voltage (I-V) measurements show that the MgO-G/n-Si exhibits better electrical properties compared to the MgO/n-Si device. Similar results were observed for the photo I-V measurements too, the MgO-G/n-Si diode exhibits excellent self-powered photoresponse characteristics with an optical responsivity of 141 mAW-1, light on/off ratio of ~ 2.2 x 103 and, specific detectivity of 9.84 x 108 Jones at -1 V, which is higher than MgO/n-Si diode (0.541 mAW-1, 28.2 and 6.89 Jones) under the 1 Sun light intensity. The obtained results show that the fabricated MgO-G/n-Si diode has a promising potential for optoelectronic application.

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“…On the other hand, the second component can interact with the matrix with the formation of new joint phases [ 65 , 68 , 69 ]. Both the size of the distributed particles and the presence of the joint phases govern the catalytic and optical properties [ 65 , 68 , 69 , 70 , 71 ].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis and Characterization of the Cu-Mg-O System for Chemical Looping Application

et al. 2022

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A sol-gel technique was applied to prepare the two-component oxide system Cu-Mg-O, where MgO plays the role of oxide matrix, and CuO is an active chemical looping component. The prepared samples were characterized by scanning electron microscopy, low-temperature nitrogen adsorption, and X-ray diffraction analysis. The reduction behavior of the Cu-Mg-O system was examined in nine consecutive reduction/oxidation cycles. The presence of the MgO matrix was shown to affect the ability of CuO towards reduction and re-oxidation significantly. During the first reduction/oxidation cycle, the main characteristics of the oxide system (particle size, crystallization degree, etc.) undergo noticeable changes. Starting from the third cycle, the system exhibits a stable operation, providing the uptake of similar hydrogen amounts within the same temperature range. Based on the obtained results, the two-component Cu-Mg-O system can be considered as a prospective chemical looping agent.

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Optical and structural properties of Mn doped MgO powders synthesized by Sol-gel process

Cited by 14 publications

References 22 publications

Production of high-transparent MgO films by radio-frequency sputtering method

Production of high-transparent MgO films by radio-frequency sputtering method

The synthesis of MgO and MgO-graphene nanocomposite materials and their diode and photodiode applications

Sol-Gel Synthesis and Characterization of the Cu-Mg-O System for Chemical Looping Application

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