Optical and structural characteristics of electrodeposited Cd 1-xZnxS nanostructured thin films
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Access Rights
info:eu-repo/semantics/closedAccess
Abstract
The structural and optical characteristics of Cd1-xZnxS (CdZnS) thin films grown by the electrodeposition method were investigated in the present paper. The crystalline structure of the grown CdZnS thin film was determined as cubic wurtzite due to observed diffraction peaks associated with (111) and (220) planes. Atomic compositional ratios of the constituent elements were obtained using energy dispersive spectroscopy and doping concentration of the Zn was found as 5% (x ~ 0.05). Scanning electron microscopy image of the studied thin film indicated that grown film is nanostructured. Raman spectra of CdS and CdZnS thin films were measured and it was seen that observed longitudinal optical modes for CdZnS present a blue-shift. Temperature-dependent band gap energy characteristics of the thin films were studied performing transmission experiments in the 10–300 K temperature range. The analyses of the recorded transmittance spectra showed that direct band gap energy of the films decreases from 2.56 eV (10 K) to 2.51 eV (300 K) with the increase of temperature. The band gap energy vs. temperature dependency was studied applying well-known Varshni optical model and various optical parameters of the films were reported according to the results of the applied model. © 2021 Elsevier B.V.
Description
Keywords
Cd1-xZnxS, CdS, Optical properties, Thin film, Blue shift, Cadmium sulfide, Electrodeposition, Electrodes, Energy dispersive spectroscopy, Energy gap, II-VI semiconductors, Optical films, Scanning electron microscopy, Semiconductor doping, Thin films, Zinc compounds, Zinc metallography, Zinc sulfide, Electrodeposition methods, Longitudinal optical modes, Nanostructured thin film, Optical characteristics, Scanning electron microscopy image, Structural characteristics, Temperature dependencies, Transmission experiments, Sulfur compounds
Journal or Series
Optical Materials
WoS Q Value
Q2
Scopus Q Value
Q1
Volume
114
