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PARVIN ASOGAN
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Volume 46 All articles Published: 4 March 2023 Article ID 0046
Effects of bath temperature on the properties of chemical bath-deposited FeS$_x$O$_y$ films
PARVIN ASOGAN ADRIAN AFZAL ARIFF AIZUDDIN SUPEE RAFIZIANA MD KASMANI NORAZANA IBRAHIM MOHD AKHMAL MUHAMMAD SIDEK MOHD ZAMRI MOHD YUSOP ABD KHAMIM ISMAIL
Iron-sulphide-oxide (FeS$_x$O$_y$) thin films were prepared on fluorine-tin-oxide (FTO)-coated glass substrate for 3-h-deposition times via chemical bath deposition (CBD) from an aqueous solution, containing 100 mM sodium thiosulphate (Na$_2$S$_2$O$_3$), 30 mM iron (II) sulphate heptahydrate (FeSO$_4$.7H$_2$O) and 50 mM L(+)-tartaric acid (C$_4$H$_6$O$_6$) as the complexing agent. The effects of bath temperature (45–90°C) on FeS$_x$O$_y$ film properties including optical, structural, impurities, composition and surface morphology were studied. Characterization equipment, such as scanning electron microscopy equipped with energy dispersive X-ray spectroscopy: thickness estimated from the cross-section image, surface morphology and composition; X-ray diffraction: crystallinity/amorphous; Raman spectra: impurities; UV–vis spectroscopy: transmittance and bandgap estimation; and Hot Probe method: photoresponse, has been used in analysing the properties of the deposited films. The optimum bath temperature of 75°C has resulted in better film quality in terms of compactness, uniformity and crystallinity (larger crystallite size). All the deposited films exhibited n-type photoresponse with a large bandgap of 3.36–3.57 eV, which could be associated with crystallinity (crystallite size), phase purity and high oxygen content (>50%).
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Bulletin of Materials Science
Volume 46, 2023
All articles
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