Journal
OPTIK
Volume 168, Issue -, Pages 764-777Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2018.04.129
Keywords
Sol-gel; Optical constant; Nanocrystalline films; SEM
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The structure, morphology and particle size of La-doped ZnS nanocrystalline films were investigated by XRD, SEM and FUR. XRD showed that the obtained films are nanocrystalline corresponding to the hexagonal ZnS phase with the particle size 3.44-15.13 nm. Optical properties of La-doped ZnS nanocrystalline films were investigated by UV-vis absorption technique. The band gap energy of nanocrystalline films was found to be 2.93 to 2.77 eV. Wemple - Didomenico single effective oscillator model was used to study the dispersion of nanocrystalline films refractive index. The red shift in the absorption band edge of the La-doped ZnS samples provides possibility for improving the solar energy application of ZnS. (C) 2018 Elsevier GmbH. All rights reserved.
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