ZnO nanoparticles (ZnO-NPs) were prepared by a solegel combustion method from a zinc acetate precursor and acetic acid. The ZnO-NPs were synthesized at calcination temperatures of 650 C and 750 C for 1 h. The synthesized ZnO-NPs were characterized by X-ray diffraction analysis (XRD) and TEM. The XRD results revealed that the sample product was crystalline with a hexagonal wurtzite phase. Highma...

For the limitation of experimental methods in crystal characterization, in this study, the mechanical, thermodynamic and electronic properties of wurtzite and zinc-blende GaN crystals were investigated by first-principles calculations based on density functional theory. Firstly, bulk moduli, shear moduli, elastic moduli and Poisson's ratios of the two GaN polycrystals were calculated using Voig...

A novel photodetector, based on Cu2ZnSnS4, CZTS, is deposited Cu/CuFeO2 for wavelength and light power intensity detection. The preparation of CuFeO2 carried out by the direct combustion Cu foil wetted with Fe(NO3)2 solution. CZTS using hydrothermal method, then it dropped drop casting method at 70 °C. Various analyses are used to look chemical, morphological, optical aspects Cu/CuFeO2/CZTS, su...

Pyroelectric materials can harvest energy from naturally occurring ambient temperature changes, as well artificial notably industrial activity. Wurtzite- based have the advantage of being cheap, non-toxic, and offering excellent opto-electrical properties. Due to their non-centrosymmetric nature, all wurtzite crystals both piezoelectric pyroelectric Nanocrystalline ZnS, a room stable material, ...

Optimization of the back contact interface is crucial for improving performance Cu2ZnSnS4 (CZTS) thin film solar cells. In this paper, self-depleted CuSCN deployed as an intermediate layer at Mo/CZTS to improve quality contact. This layer, obtained via aqueous solution processing, reduces thickness Mo(S,Se)2 and eliminates multi-layer crystallization absorber by suppressing undesirable reaction...

undoped and mn-doped zno nanoparticles were successfully prepared by the hydrothermal method with different annealing temperature conditions. structural, chemical and optical properties of the samples were studied by x-ray diffraction (xrd), field emission scanning electron microscopy (fesem), uv-vis spectrophotometry and fourier transform infrared (ft-ir) spectroscopy. the phase purity was con...

Abstract The study focuses on the optical properties of CZTS multicomponent semiconductor absorber with 3 % “production” impurities Cd, Na, O within framework density functional theory using generalized gradient approximation and SCAPS program, as well investigates their influence performance efficiency CZTS-solar cells. results showed that introduction would lead to a decrease in intensity abs...

We present results of a density functional theory study of MnO in the wurtzite structure. Our motivation is provided by recent experiments reporting ferromagnetism in Mn-doped wurtzite-structure ZnO. We find that wurtzite MnO a) is not strongly energetically disfavored compared with the ground state rocksalt MnO, b) shows strong magneto-structural coupling and c) has a piezoelectric response th...

We report a new biphasic crystalline wurtzite/zinc-blende homostructure in gallium nitride nanowires. Cathodoluminescence was used to quantitatively measure the wurtzite and zinc-blende band gaps. High-resolution transmission electron microscopy was used to identify distinct wurtzite and zinc-blende crystalline phases within single nanowires through the use of selected area electron diffraction...