Study of nickel doping effects on structural, electrical and optical properties of sprayed ZnO semiconductor layers

Effect of copper concentration on the physical properties of ZnS:Cu alloys prepared by chemical bath deposition

“…The increase of the extinction coefficient at larger wavelengths is related to the contribution of the absorption of the free carriers which is much stronger for ZnS:Cu films compared to the ZnS film. Similar behavior of extinction coefficient was observed by Mahdhi et al [33] for Ca-doped ZnO thin films sputtered from nanopowders compacted target and Mhamdi et al [34] for sprayed Ni-doped ZnO thin films. The dielectric constant is directly related to the refractive index as well as the extinction coefficient according to the following relation [34]:…”

Structural, optical properties and characterization of (C2H5NH3)2CdCl4, (C2H5NH3)2CuCl4 and (C2H5NH3)2Cd0.5Cu0.5Cl4 compounds

“…In semiconductors, this correlation works very well, and even extends to an analogous correlation with the band gap energy [39]. Under the same model, the refractive index can also be analyzed to determine the average oscillator wavelength λ 0 and oscillator length strength S 0 of the studied samples.…”

Impedance spectroscopy and sensors under ethanol vapors application of sprayed vanadium-doped ZnO compounds

“…This behavior can be attributed to the fact that at low temperatures, the conduction loss is minimal, when the temperature increases the conduction loss increases due to the increase in conductivity [9,10]. This reinforces the value of dielectric loss with increasing temperature.…”

“…ZnO thin films can be fabricated using laser ablation [5], RF magnetron sputtering [6], phase Spray paralysis [1] and sol-gel process [7] etc... Measurements of AC conductivity of oxide thin films, such as: ZnO:Cu, ZnO:Ni, WO 3 and Sb 2 O 4 have been extensively studied, where the basic characteristic of the real part of AC conductivity is a power law frequency dependence [8][9][10][11]. During the recent years, the concern over environmental protection and increasing demands for monitoring hazardous and inflammable gases in industry and home have attracted extensive interests in developing gas sensors for these gases.…”