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International Journal of Thin Films Science and Technology



Chemical deposition of polycrystalline ZnSe thin films from Malonic acid solution: Nucleation and growth mechanism, structural, optical and electrical studies

Abstract :
Zinc selenide (ZnSe) polycrystalline semiconductor thin films have been synthesized by dip method in malonic acid solution. The formation of nucleus and growth process of this technique has been studied. The XRD pattern shows a characteristic cubic structure with a (111) crystallographic preferred orientation. SEM studies reveal that grains are uniformly dispersed on the surface of the substrates. The optical energy gap was found to be 2.80 eV. The activation energies are 0.053 and 0.317 eV for low and high temperature region, respectively obtained from electrical measurement.


Study the Synthesis Parameter of Tin Oxide Nanostructure

Abstract :
: In this article, the effect of synthesis parameters on structural properties of SnO2 nanowire by thermal evaporation process, have been studied. The nanostructures are characterized by scanning electron microscopy, Transmission electron microscopy and X-ray spectroscopy. By X- ray diffraction pattern, synthesized SnO2 nanowire were found to be crystalline rutile SnO2. We studied the effect of synthesis parameters such as the deposition temperature, distance variation of the substrate from precursor on the structure of our synthesized nanowires. It was found that their growth was governed by vapor–liquid–solid mechanism (VLS) because of using Sn self catalyst. In this mechanism, the Sn droplet deposited serve as preferred sites for the growth of SnO2 nanowire.

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