SnO2 nanocrystalline thinfilms were prepared by spray pyrolysis method on glass substrates at 375, 400, 425, 450 and 500oC. Structural, optical and electrical properties of these films were studied by XRD, UVVisible and Four-probe methods. The change in electrical conductivity, band gap and optical transmittance was found to be a function of the change in lattice parameters ∆a and ∆c. The sampl...

The effect of Zn:Se ratio on the photoconducting properties of ZnSe thin films has been studied. The ZnSe thin films have been deposited onto glass substrates by the spray pyrolysis method, the substrate temperature kept at 430◦C using mixed aqueous solutions of ZnCl2 and SeO2 with different Zn:Se ratios. Their electrical, structural, and photoconductivity properties have been studied. The valu...

The three-photon absorption (3PA) in nanostructure wide-band gap ZnO semiconductor material is observed under high intensity femtosecond Titanium-Sapphire laser of 800 nm wavelength excitation. The ZnO film was prepared by chemical spray pyrolysis technique with substrate temperature of 400 o C. The optical properties concerning the absorption, transmission, reflection, Raman and the photolumin...

The integration of gas sensing elements into hand-held electronics will provide individuals the ability to detect harmful chemicals and pollutants in the environment in real time. Metal oxide gas sensors rely on changes in their electrical conductance due to the interaction of the oxide with a surrounding gas at an elevated temperature. The intrinsic stress in the metal oxide films during the l...

Titanium dioxide thin films were deposited on (0001) -quartz substrate by spray pyrolysis method. The method which an aerosol of Titanium Butoxide, generated ultrasonically, was sprayed on the substrate at temperature of 400 ̊C, kept at this temperature for periods of 3, 13, 19 and 39 hours. The developed films at a crystal phase correspond to the TiO2 anatase and rutile phases. Their surface r...

Abstract: TiO2 thin films were prepared by spray pyrolysis technique at a substrate temperature of 350C under optimum conditions. Films have uniform thickness varying from 0.3–6 μm and good adhesion to substrate. The films were characterized by XRD, SEM and EDAX measurements. XRD profile shows poly crystalline nature of films. As deposited films have anatase phase. Transformation from anatase t...

Erbium-doped Y20 3 planar optical waveguides have been fabricated by spray-pyrolysis deposition. The attenuation spectrum of the waveguide shows peaks that are due to absorption of the erbium ions. The as-deposited layers also show photoluminescence sharply peaking at 1540 nm with additional Stark splitting. The thin layers of Er 3:Y 203 obtained are promising for the realization of integrated-...

Pure and doped magnesium oxide (MgO) thin films were prepared with different volumetric ratios (0, 2, 4, 6, 8%) of zinc sulfide (ZnS) on glass substrates at (350 °C) by chemical spray pyrolysis technique. The surface topography, absorption spectrum, coefficient Urbach energy the studied. atomic force microscopy (AFM) results revealed that topography changes as percentage doping increases. absor...