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Publications (21)
In this work, we present and report on the evolution of thermoelectric properties altered through changes in the energy barrier height in thermally evaporated mixed-phase copper sulfide thin films. The physical interpretations depend on the conception of degenerate energy levels near the top of the valence band. The energy barrier at grain boundari...
Maximizing the power delivered by a thermoelectric generator (TEG) (with an internal resistance R TE) can be achieved by optimizing its design taking into account the external load (with a resistance of R L). In the present work, the evolution of the thermoelectric (TE) properties of the materials along the leg was considered. By considering a fixe...
In this paper, we present the effects of annealing in a vacuum on the structural, electrical, thermoelectric, optical and properties of a glass/ITO (40 nm)/Cu (5 nm)/Ni (10 nm)/ITO (40 nm) multilayer prepared on glass substrates at room temperature using the Radio Frequency (RF) sputtering technique. The effect of annealing in a vacuum is investiga...
Nickel oxide material is considered an interesting class of p-transparent-conductive oxides for various fields of application. Improving the conductivity of these materials while retaining a high level of optical transmittance is considered a real challenge for their functional use. In the present work, a detailed study of the effect of cobalt inco...
Thin films of tungsten oxide were deposited on glass substrates by the radio frequency (RF) reactive sputtering from a high purity tungsten metal target (99.9%) with a diameter of 10 cm. The reactive sputtering was carried out in an argon-oxygen gas mixture containing 20% of O 2 and 80% of Ar. The used RF power is 200 W while fixing the deposition...
In this work, copper oxide nanowires (CuO NWs) were synthesized on fluorine-doped tin oxide/glass substrates using the electrochemical technique followed by thermal oxidation in air atmosphere. In particular, we study the effect of the annealing time (4, 6, 8, 10 and 12 h) on CuO NWs properties. It was proved that the population density of CuO NWs...
In this study, we focus on the effect of the radio frequency (RF) sputtering power on the structural, optical and electrical properties of NiO thin films, deposited on glass substrates in the O2/Ar atmosphere. It was observed that by increasing the RF power from 50 to 300 W, the crystallite size increases from 5.5 to 8.28 nm then decreases for 350...
In this work, we study the effect of vacuum annealing and position of metal Cu on structural, optical, electrical and thermoelectrical properties of ITO/Cu/ITO multilayers prepared on glass substrates, at room temperature by Radio Frequency (RF) sputtering. ITO (80 nm)/Cu(5 nm)/ITO (80 nm) ICI(a) and ITO (150 nm)/Cu(5 nm)/ITO (10 nm) ICI(b) multila...
Different phases of copper sulfide were synthesized by the Flash Evaporation method, followed by annealing at various temperatures. Pure and mixed crystal structures of the covellite, digenite and djurleite phases were identified by the X-ray diffraction patternsand Raman spectroscopy. Scanning Electron Microscopy revealed the effect of annealing o...
In this report, the Multifunctional Quinary Cu2Ni0.50Co0.50SnS4 synthesized by an inexpensive and easy-to-use using spin-coating technique on glass substrates. XRD spectra of Cu2Ni0.50Co0.50SnS4 annealing at 300°C demonstrated the structure similar to that of Cu2NiSnS4 and Cu2CoSnS4 for 60 min and 90 min, but Raman scattering confirmed the structur...
In this paper, Nickel oxide (NiO) thin films were synthesized by the reactive radio frequency sputtering. NiO thin films were annealed at different temperatures (350, 400, 450 and 500 °C). Structural characterizations were performed using X-Ray Diffraction, Scanning Electron Microscopy (SEM), Raman spectroscopy, Infrared spectroscopy. Ultraviolet–v...