Abstract
The cadmium sulfide/reduced graphene oxide (CdS/rGO) composite thin films were synthesized on stainless steel (SS) substrates using the successive ionic layer adsorption and reaction (SILAR) method. The physico-chemical properties of CdS/rGO films were studied. The X-ray diffraction (XRD) revealed the growth of nanocrystalline CdS/rGO films with a cubic crystal structure. The field-emission scanning electron microscopy (FE-SEM) images of CdS/rGO-80 composite thin films showed compact spherical nanoparticles and an optical band gap found to be 2.27 eV. The CdS/rGO-80 composite thin film displayed hydrophilic nature with a water contact angle of 33°. The photoelectrochemical (PEC) studies of CdS/rGO thin film in dark and under light exhibited n-type of electrical conductivity with an improved photoactivity over bare CdS in 1 M polysulfide (NaOH + Na2S + S) electrolyte. It is observed that rGO composited CdS thin film enhances the conversion efficiency (η) from 0.09 to 0.31% than bare CdS films. The electrical transport properties were investigated by electrochemical impedance spectroscopy (EIS) study in dark and under illumination conditions and corresponding equivalent circuit of the impedance model is developed.
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Authors are thankful to the Science and Engineering Board (SERB), Department of Science and Technology, India, New Delhi for the financial support through sanction number TTR/2021/000006 dated 24 March 2021.
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Mr. RPN: carried out an investigation and formal analysis, data curation, and original draft writing, Mr. ACL: provided resources and formal analysis. Mr. SD K and Mr. VJM: carried out modification, creation, and presentation and visualization of the manuscript. Prof. CDL: carried out funding acquisition, administration, supervision, manuscript editing. All persons made substantial contributions to the work reported in the manuscript.
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Nikam, R.P., Lokhande, A.C., Khot, S.D. et al. Chemical synthesis and photoelectrochemical study of CdS/rGO nanocomposite films. J. Korean Ceram. Soc. 60, 238–251 (2023). https://doi.org/10.1007/s43207-022-00258-1
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DOI: https://doi.org/10.1007/s43207-022-00258-1