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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:01 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Solid State Physics and Materials Science, Optics, Spectroscopy, Plasma and Lasers
Title:
TOWARDS A STOICHIOMETRIC ELECTRODEPOSITION OF SnS
Authors:
R. EL OTMANI (1,2), A. ALMAGGOUSSI (1), A. RAJIRA (1), M. LABRINI1, A. ABOUNADI(1), A. EL MANOUNI (2), M. E. KHADIRI (3), J. BENZAKOUR (3) , J. EL
HASKOURI (4), S. MURCIA MASCAROS (4)
*
Affiliation:
1) MED-Lab, Cadi Ayyad University, Faculty of Science and Technology, BP 549, 40000 Marrakech, Morocco.
2) LNMAMT, Hassan II University, Faculty of Science and Technology, BP 145 Mohammedia, BP 145 Mohammedia Morocco.
3) Applied Chemistry and Biomass Laboratory, Cadi Ayyad University, Faculty of Sciences Semlalia, BP 2390 Marrakech, Morocco.
4) Institute of Ciènciadel Materials of the University of Valencia (ICMUV), Calle Catedrático José Beltrán-2 46980 Paterna-València, Spain.
E-mail
elotmani.rokaya@gmail.com
Keywords:
SnS, Electrodeposition, TEA, EDTA, RAMAN, Optical properties.
Abstract:
Abstract: SnS films have been grown at room temperature by electrochemical deposition technique on to ITO (indium-tin-oxide) coated glass substrates. Tin chloride (SnCl2) and sodium thiosulphate (Na2S2O3) were used in aqueous solution as precursors and ethylenediamine tetraacetic acid (C10H16N2O8, EDTA) or triethanolamine (C6H15NO3, TEA) was added to slow the deposition rate of Sn. The pH of each solution was adjusted to 1.8. The deposition time was 60 min and the potential was maintained to -1 V vs Ag/AgCl electrode. The structural, morphological and optical properties of the electrodeposited films were investigated. X-ray diffraction patterns confirm the polycrystalline samples’ nature as the α-SnS orthorhombic structure. A clear change in the preferential growth direction was observed when adding TEA. Raman spectroscopy spectra exhibit five bands belonging to both transversal and longitudinal optical phonons modes that match with the α-SnS prototype ones. Scanning electron microscopy images show that the films morphology was highly influenced by the complexing agent. The addition of EDTA leads to significant decrease in particle size, while that of TEA results in a mixture of both small and large particles. Energy-dispersive X-ray spectroscopy measurements demonstrate that the addition of complexing agent, TEA or EDTA, leads to a close stoichiometry with better crystallographic properties for TEA addition. The optical characterization shows that the addition of EDTA results in a blue shift of the band gap energy, while the addition of TEA rather causes its red shift.
References:
[1] M. Minbashi, A. Ghobadi, M.H. Ehsani, H.R. Dizaji, N. Memarian, Sol. Energy 176, 520–525 (2018).
[2] V.E. González-Flores, R.N. Mohan, R. Ballinas-Morales, M.T.S. Nair, P.K. Nair, Thin Solid Films 672, 62–65 (2019).
[3] T.R. Rana, S.Y. Kim, J.H. Kim, Curr. Appl. Phys. 18, 663–666
(2018)
[4]J. Kois, S. Bereznev, J. Maricheva, N. Revathi, Mater. Sci. Semicond. Process. 58, 76–81 (2017
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