OMAR Meglali
عمر مقلالي
omar.meglali@univ-msila.dz
0795280886
- Teaching service - Common trunk Nature and Life Sciences
- Faculty of Sciences
- Grade Prof
About Me
Research Domains
Thin films Materials characterization Photovoltaïque energy Chalcopyrite semiconctors
LocationMsila, Msila
Msila, ALGERIA
Code RFIDE- 1976-09-22 00:00:00
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OMAR Meglali birthday
- 2022
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2022
Effet of cobalt doping on the physical properties of ZnO thin films for photocatalytic application
In this work pure and Co doped ZnO thin films have been deposited onto glass substrate at different levels of Co-doping. XRD, SEM, and optical spectroscopy techniques have been used to investigate all films. The grain size was found to increase upon Co doping from 26.2 nm to 50.3 nm.
Citation
MILOUD Ibrir , abdelkader MOHAMMEDI , Omar MEGLALI , ,(2022), Effet of cobalt doping on the physical properties of ZnO thin films for photocatalytic application,1er Séminaire National des sciences du Génie des Procédés,USTHB-Alger
- 2022
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2022
Effet of doping Co-Cu co-doped ZnO on the structural and optical properties prepared by the spin-coating method
Effet of doping Co-Cu co-doped ZnO on the structural and optical properties prepared by the spin-coating method
Citation
MILOUD Ibrir , abdelkader MOHAMMEDI , Omar MEGLALI , ,(2022), Effet of doping Co-Cu co-doped ZnO on the structural and optical properties prepared by the spin-coating method,1st National Conference on Materials, Energy & Environment,Biskra
- 2020
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2020
physics properties of synthesized transition metal (co)-doped zno thin film for photovoltaic application
In this work we prepared the thin films of zinc oxide inlaid with cobalt atoms on glass substrates using sol-gel spin coating technology in different doping concentration (0%, 2% and 3%). Structural optical and electrical properties were studied by XRD, FTIR, UV-visible and quater point respectively. Structural properties showed that the films were well crystallized and had a hexagonal wurtzite crystalline structure with crystalline constants a = b = 3.249Å and c = 5.206Å for pure zinc oxide these values change as the cobalt concentration changes and the grain size were calculated. UV-Visible measurements indicated that the cobalt atomization decreases band gap, the extinction coefficient and refractive index were calculated. Structural, optical and electrical results have shown that thin films and method of preparation can help photovoltaic applications in solar cells and can improve yield for this application.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , AHMED Saoudi , ,(2020), physics properties of synthesized transition metal (co)-doped zno thin film for photovoltaic application,1st international symposium ‘Environment and Sustainable Development’,university of relizan
- 2020
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2020
PHYSICS PROPERTIES OF SYNTH ESIZED TRANSITION METAL (CO)-DOPED ZNO THIN FILM FOR PHOTOVOLTAIC APPLICATION
PHYSICS PROPERTIES OF SYNTH ESIZED TRANSITION METAL (CO)-DOPED ZNO THIN FILM FOR PHOTOVOLTAIC APPLICATION
Citation
MILOUD Ibrir , abdelkader MOHAMMEDI , Omar MEGLALI , ,(2020), PHYSICS PROPERTIES OF SYNTH ESIZED TRANSITION METAL (CO)-DOPED ZNO THIN FILM FOR PHOTOVOLTAIC APPLICATION,1s International Symposium 'Environment & Sustainable Development,Relizane
- 2019
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2019
Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications
An important milestone in the development of photovoltaic thin-film solar cells is the achievement of conversion efficiences. This work describes the highest efficiency single junction thin-film cell reported to date. n-ZnO/n-CdS/p- CuInSe2 deposited on glass substrate. The current achievements are due to improved properties of ZnO were prepared In this present study, iron doped zinc oxide thin films (ZnO: Fe) were prepared by using a simple chemical sol–gel spin coating technique on the substrate of glass varying the Fe doping concentration 0%, 1%, 5% and 10% wt. Structural and optical properties were studied respectively by X-ray diffraction and UV-visible spectroscopy. Structural results shown that all elaborated thin films are hexagonal wurtzite structure with a preferred orientation along [002] direction. Note that the lattice parameter a=b, c increases while the c constant decreases with the increasing in the Fe concentration. We found that the crystalline size increases with the addition of a Fe, it is achievedby its maximum value 21 nm for 5%. The masses density and the crystals number were calculated, the obtained resultes indicate that they are inversly proportional to the grain size the UV–visible optical transmittance measurements show that films absorption is due to allowed direct transition with a band gap ranged from 3.27 to 3.16 eV.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , AHMED Saoudi , Moufdi. Hadjab, ,(2019), Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications,The 2nd Algerian-German International Conference on New Technologies and their applications (AGICNT),SETIF - Algeria
- 2019
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2019
Effect (Co) On optical and electrical properties thin films ZnO nanostructure
In this work thin layers of ZnO were prepared with Co cobalt element in different doped concentration, On the substrate of glass prepared by sol–gel spin coating technique Concentration of doped was (0, 1 and 2%). It is for many uses, optical and electrical properties respectively were studied by UV-visible spectroscopy and by EDX by used four points . Where optical studies resulted in the results of the transmittance of the energy gap-band and the extiention coefficient and refractive index figure of merit as the rates of deflection cobalt [1, 2]. As for the electrical results, we studied the effect of the deflection ratios. We determined the electric conductivity and the square resistance. Through the study and the relationship between the optical and electrical properties, the figure of merit was calculated for the Photovoltaic uses.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , ,(2019), Effect (Co) On optical and electrical properties thin films ZnO nanostructure,CONFERENCE INTERNATIONAL DE PHYSIQUE ET CHIMIE QUANTIQUE CIPCQ 2019,Université de Bejaia
- 2019
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2019
Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications
Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications
Citation
MILOUD Ibrir , abdelkader MOHAMMEDI , Omar MEGLALI , ,(2019), Optical properties of synthesized metal transition (Fe)-doped ZnO transparent thin films prepared by sol-gel spin coating Solar cells applications,Second Algerian German International on new Technologies and their Applications,Sétif
- 2019
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2019
Effect (Co) On optical and electrical properties thin films ZnO nanostructure
Effect (Co) On optical and electrical properties thin films ZnO nanostructure
Citation
MILOUD Ibrir , abdelkader MOHAMMEDI , Omar MEGLALI , ,(2019), Effect (Co) On optical and electrical properties thin films ZnO nanostructure,3~me Congrés International de Physique et Chimie Quantique,Bijia
- 2018
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2018
Study of structural and optical properties of nanostructure Ni doped ZnO thin films prepared by sol–gel spin coating technique
In this work undoped, thin films and doped ZnO with iron concentrations were deposited on glass substrates by sol-gel spin coating. The doping concentrations of Ni are 0, 2, and 5 (% mol). The structural and optical properties were characterized by X-ray diffraction (XDR) and by UV-visible spectrometry. The results show that all the thin films crystallized in the wurtzaite hexagonal structure with a preferential orientation according to the atomic plane (002). The lattice parameter a has increased and the lattice parameter c decreased as a function of the Ni concentration. We also note that the crystallite size increases with the Ni concentration, with a maximum maximal size was found to be about 24 nm for the film of 5D. As far as optical measurements are concerned, we have found that gap energy (Eg) decreases but Urback energy increases with increasing Ni concentration.
Citation
abdelkader MOHAMMEDI , MILOUD Ibrir , Omar MEGLALI , taieb refice, ,(2018), Study of structural and optical properties of nanostructure Ni doped ZnO thin films prepared by sol–gel spin coating technique,International Conference on Materials Science 2018 (ICMS2018),university of setif 1