Mehdi Adelifard

• PhD
• Principal Investigator at Damghan University

In LiNiMnCo cathodes, Co, as an expensive metal, is limited in terms of resources and not environmentally friendly, it is always important to try to reduce or replace it with another element. Compared to Co, Fe is abundant, environmentally friendly and cheap, and can improve the safety and stability of batteries. This research examines LiMn0.6Ni0.2...

This research focused on the synthesis of gallium oxide (γ-Ga2O3) nanoparticles using sol–gel and hydrothermal techniques. X-ray diffraction (XRD), field emission electron microscopy (FESEM), UV–Vis spectrophotometer, Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), calculation o...

This study presents the synthesis and characterization of WS2/WO3 binary thin films with varying sulphur to tungsten (S/W) molar ratios ([S]/[W] = 6 and 18 at%) for gas-sensing applications. The films were obtained by annealing sprayed layers in a sulphur atmosphere. The structural, morphological, optical, electrical and gas-sensing properties of t...

Recently, multilayer thin films with different properties have attracted the attention of scientists. The nonlinear optical properties of multilayer thin films with graphene oxide (GO), reduced graphene oxide (rGO), SiO\(_{2}\), and fluorine-doped tin oxide (FTO) were investigated using the Z-scan technique under Nd:YAG laser at 532 nm with tunable...

The description of superconductivity at high-temperature is a problem that has recently been addressed. Transition temperature of superconductivity, Tc, depends on the lattice structure type, size and room pressure. In super-lattices and low-dimensional layered nanostructures, Tc is increased by increasing the complexity of the structure and intern...

Purpose In the past several years, CH 3 NH 3 PbI 3 perovskite material has been extensively evaluated as an absorber layer of perovskite solar cells due to its excellent structural and optical properties, and greater than 22% conversion efficiency. However, improvement and future commercialization of solar cells based on CH 3 NH 3 PbI 3 encountered...

Silver bismuth iodide (SBI) rudorffites have received a lot of attention in photovoltaic applications because of their high stability and low toxic properties. Herein, the partial substitution of silver (Ag) with cesium (Cs) and also bismuth (Bi) with antimony (Sb) is investigated. According to the obtained results, adding Sb and Cs to the SBI comp...

Perovskite solar cells based on spin-coated (CH3NH3)3Bi2I9 and Cs3Bi2I9 thin films were fabricated, and the thickness-dependent structural, morphological, optical, and photovoltaic properties were studied. The x-ray diffraction studies revealed the formation of a hexagonal structure in the studied perovskite layers, and an improvement in crystallin...

Due to the nontoxic and air-stable nature of bismuth-based photovoltaic materials, they are suitable materials to replace lead-based perovskite ones. In this research, the influence of doping with multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (RGO) on the structural, morphological, and optical properties of silver bismuth iodide...

In this study, highly porous and ultralight cellulose aerogel (CA) was successfully synthesized via a novel and facile ambient pressure drying technique. In this drying method, naphthalene (NPH) as the porous-making agent occupied space between cellulose fibers and controlled structural collapse and severe shrinkage of samples successfully. By subl...

In this work, the effect of substrate temperature and substrate type on physical properties of the Sb2S3 thin film were investigated. First, Sb2S3 thin films have been deposited by spray pyrolysis method using an aqueous solution of antimony chloride and thiourea on the glass at a substrate temperature of 240 °C to 330 °C. Then, the deposition proc...

In this work, Silicon oxide (SiO2) nanoparticles, graphene oxide nanosheet (GO) and GO–SiO2 nanohybrid composites have been synthesized. The role of GO concentration in the starting solution was investigated and correlated to the morphological, structural and optical properties of the studied samples. The structural studies for nanohybrid composite...

Silver bismuth iodide perovskites are good substitutes instead of lead-based perovskites because they are nontoxic and stable in air. In this study, Ag–Bi–I thin films with various ratios of Ag/Bi = 3, 2, 1, 0.5 were prepared by spin coating of AgI and BiI3 dissolved in dimethylsulfoxide. In this research, Microwave was used for heat treatment of p...

In this paper, a feasibility of semi-classical electromagnetic description together with experimental data, T-K-H topological and dynamic models and theory of vortex considered to justify the relation between superconductivity phenomena and magnetic monopole. We find that the electromagnetic energy of magnetic monopole is in agreement with vortex e...

The Cu2FeSnS4 (CFTS) nanostructured thin films have been spray deposited onto glass substrates without any post-sulfurization in toxic atmosphere such as H2S or ‘S’ vapor. The influence of substrate temperatures on the structural, morphological, compositional, optical, electrical and photoconductivity properties of the CFTS thin films have been stu...

There is a great interest in the use of graphene sheets in thin film solar cells with low-cost and good-optoelectronic properties. Here, the production of absorbent conductive reduced graphene oxide (RGO) thin films was investigated. RGO thin films were prepared from spray-coated graphene oxide (GO) layers at various substrate temperature followed...

We have investigated the impact of sulfurization and changing the metal salt ratio ([s]/[w] = 6–24 at.%) in the precursor solution on the structural, morphological, optical, electrical and photoconductivity properties of WS2/WO3 binary thin films grown on glass substrate by the spray pyrolysis technique. X–ray diffraction analysis showed that while...

We have investigated the effect of sulfur concentration ([S]/[Mo] = 0–10 at.%) on nanostructural, optical and electrical properties of MoO3 thin films grown on glass substrate by spray pyrolysis technique. X-ray diffraction analysis showed that the films were crystallized with mixed structures of MoO3 orthorhombic and MoS2 hexagonal structure. Acco...

Silver sulfide (Ag2S) thin films have been deposited onto glass substrates using spray pyrolysis technique. The substrate temperature (260–310 °C) and also Ag to S molar ratio (0.33 and 0.43) dependent structural, morphological, optical, electrical and thermoelectrical properties of samples have been studied. The X-ray diffraction studies showed th...

Photovoltaic Cu2ZnSnS4 (CZTS) thin films have been deposited on the glass substrate by a simple and low-cost spray pyrolysis technique without sulfurization treatment in a toxic atmosphere. The influence of the substrate temperatures on the structural, compositional, morphological, optical and electrical properties of the CZTS films was investigate...

Cu2ZnSnS4 (CZTS) absorber layers have been deposited via a spray pyrolysis technique without sulfurization process. Spray precursor solutions were prepared with different zinc to tin ratios, and the effects on film growth, structural, compositional, morphological, optical and electrical properties were investigated. The formation of kesterite struc...

We have established the effect of copper dopant concentration (Cu/Sn = 0 - 30 at.%) on the structural, morphological and optical properties of SnO2 : S films grown on glass substrate using a spray pyrolysis technique. According to the experimental evidence and data analysis, we found that the polycrystalline layers in undoped condition mainly consi...

We have investigated the effect of zinc concentration ([Zn]/[Cu]=0–100 at%) on nanostructural, optical and electrical properties of CuS–ZnS binary thin films grown on glass substrate by the spray pyrolysis technique. X-ray diffraction analysis showed that the films were crystallized with mixed structures of CuS hexagonal and ZnS cubic structure. UV...

Cux S thin films with different Cu to S molar ratios (0·33 and 0·43) have been deposited by spray pyrolysis method on glass and FTO coated glass substrates using an aqueous solution of copper (II) acetate and thiourea at a substrate temperature of 285°C. The structural, surface morphological, optical and electrical characterizations of the samples...

Copper sulphide (CuS) thin films have been deposited on glass substrates by spray pyrolysis method using an aqueous solutions of copper (II) acetate and thiourea with different Cu to S molar ratios (0.33 and 0.43) at various substrate temperatures of 260, 285 and 310 °C. The structural, optical and electrical characterizations have been carried out...

Thin films of Cu2SnS3 have been deposited by the spray pyrolysis technique. Various Sn/Cu molar ratios (from 0.0 to 1.0) were applied, which allowed the study of the copper tin sulfide phase. Structural, morphological and compositional analyses have been carried out using x-ray diffraction, field emission scanning electron microscopy and energy dis...

We have investigated the effect of fluorine dopant concentration (0–15 F/Sn wt.%) on structural, optical and electrical properties of SnO2 thin films grown by spray pyrolysis technique. According to the experimental evidences and data analysis, we found in these samples: (1) the polycrystalline layers, while in undoped conditions it mainly grow alo...