Abstract
Cd1−x Zn x S (with x = 0, 0.01, 0.03, 0.05 and 0.1) nanopowder were synthesized by chemical precipitation method under N2 atmosphere at room temperature. Cd1−x Zn x S nanostructured thin films were deposited on the glass at 450 °C by spraying the colloidal suspension of the Cd1−x Zn x S nanoparticles. Optical and structural properties of both nanostructures were investigated. The prominent peaks of X-ray diffractions (XRD) of samples indicate that the Cd1−x Zn x S crystalline grain size in the nanostructured thin film is larger than the Cd1−x Zn x S nanoparticles in the nanopowder, due to growing of the grains, originated from high temperature of the substrate. UV-Vis absorption spectra show that both Cd1−x Zn x S nanostructures have smaller band edge wavelength in comparison with bulk samples. There is also an increase in blue shift value of the band gap of both Cd1−x Zn x S nanostructures, with increasing x, which can be attributed to Burstein-Moss effect. It was found that the variation of the band gap of Zn x Cd1−x S nanopowder and nanostructured thin films with Zn concentration are approximately linear with similar slopes. Photoluminescence (PL) spectra indicated that the emission peaks of both the samples are shifted toward the shorter wavelengths with increasing Zn+2 ions.
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Orimi, R.L., Abbasi, M. Synthesis and characterization of Cd1−xZnxS nanopowder and its nanostructured thin films. Eur. Phys. J. D 68, 48 (2014). https://doi.org/10.1140/epjd/e2013-40569-3
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DOI: https://doi.org/10.1140/epjd/e2013-40569-3