Optical properties of zinc sulfide (ZnS) thin films prepared by chemical spray pyrolysis



Abstract. In this work we study the properties of zinc sulphide (ZnS) thin films, deposited by chemical spray pyrolysis technique at an optimized deposition parameters such as scanning nozzle speed, pressure and time of 5 mm/s along X and Y-axis, 1 bars and 10 min respectively. The glass substrates temperature was varied from 300°C to 450°C, using a starting solution of 0.1M dehydrated zinc acetate and 0.05M thiourea. Studies on optical, structural and morphological properties were performed on the samples using UV-VIS spectrophotometer, X-ray diffraction (XRD), and Raman spectroscopy. XRD revealed amorphous structure of ZnS films. Raman spectroscopy investigation was used for identification of the phonons in the spectra of ZnS thin films. The optical properties of these films indicated a large band gap of 3.23 eV to 3.68 eV, and relative optical transmittance in the visible spectra of more than 80%, making ZnS films suitable as electroluminescent, buffer layer in thin films solar cells and dielectric filters.

Insulator Thin Films, Spray Pyrolysis, Zinc Sulfide, ZnS, Optical Characterization, UV-Visible Spectroscopy, XRD, Raman Scattering

Published online 12/10/2016, 4 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: N. TOUIDJEN, F. MANSOUR, B. BENDAHMANE, M.S. AIDA, ‘Optical properties of zinc sulfide (ZnS) thin films prepared by chemical spray pyrolysis’, Materials Research Proceedings, Vol. 1, pp 139-142, 2016
DOI: http://dx.doi.org/10.21741/9781945291197-35

The article was published as article 35 of the book Dielectric Materials and Applications

[1] Geeta Rani,P.D.Sahare, ’’Spectroscopy of Nickel-Doped Zinc Sulfide Nanoparticles’’. Spectroscopy Letters, 46, (6), (2013).
[2] Nguyen Hutuan, Soonillee, Nguyen Nang Dinah” Investigation of pure green-colour emission from inorganic-organic hybrid LEDs based on colloidal CdSe/ZnS quantum dots’’. Int. Journal of Nanotechnology, 10, (3), 304-312, (2013).
[3] Sagadevan Sureshb,’’Synthesis, structural and dielectric properties of zinc sulfide nanoparticles’’. International Journal of Physical Sciences, 8(21), 1121-1127 (2013).
[4] M.Espindola-Rodriguez, M.Placidi, O.Vigil-Galán, V.Izquierdo-Roca, X.Fontané, A.Fairbrother D.Sylla, E.Saucedo , A.Perez-Rodríguez, ’’ Compositional optimization of photovoltaic grade Cu2ZnSnS4 films grown by pneumatic spray pyrolysis ”.Thin Solid Films, (535), 67–72, (2013).
[5] P.O.Offor, B.A.Okorie, B.A.Ezekoye, V.A.Ezekoye, j.I.Ezema , ’’Chemical spray pyrolysis synthesis of zinc sulphide (ZnS) thin films via double source precursors”.Journal of Ovonic Research, 11, (2), 73–77, (2015).
[6] A.Brayek, M.Ghoul, A.Souissi, I.BenAssaker, H.Lecoq, S.Nowak, S.Chaguetmi, S.Ammar, M.Oueslati, R.Chtourou ’’, Structural and optical properties of ZnS/ZnO core/shell nanowires grown on ITO glass’’. MaterialsLetters, 29, 142–145, (2014). http://dx.doi.org/10.1016/j.matlet.2014.04.192
[7] A.Khan Alim, A.Vladimir Fonoberov, Shamsa.Manu, and A. Balandin Alexander,”Micro-Raman investigation of optical phonons in ZnO nanocrystals’’, Journal of Applied Physics, 97, 124313, (2005). http://dx.doi.org/10.1063/1.1944222