Deposition Time induced Structural and Optical Properties of Lead Tin Sulphide Thin Films

J. Damisa; J. O. Emegha; I. L. Ikhioya

doi:10.46481/jnsps.2021.157

Authors

J. Damisa
J. O. Emegha
[email protected]

Department of Physics, University of Benin, Benin City, Edo State, Nigeria
I. L. Ikhioya
Department of Physics and Astronomy, University of Nigeria, Nsukka, Enugu State, Nigeria

Keywords:

Thin films, XRD, band gap, Pb-Sn-S, refractive index, absorption coefficient

Abstract

Lead tin sulphide (Pb-Sn-S) thin films (TFs) were deposited on fluorine-doped tin oxide (FTO) substrates via the electrochemical deposition process using lead (II) nitrate [Pb(NO₃)₂], tin (II) chloride dehydrate [SnCl₂.2H₂O] and thiacetamide [C₂H₅NS] precursors as sources of lead (Pb), tin (Sn) and sulphur (S). The solution of all the compounds was harmonized with a stirrer (magnetic) at 300k. In this study, we reported on the improvements in the properties (structural and optical) of Pb-Sn-S TFs by varying the deposition time. We observed from X-ray diffractometer (XRD) that the prepared material is polycrystalline in nature. UV-Vis measurements were done for the optical characterizations and the band gap values were seen to be increasing from 1.52 to 1.54 eV with deposition time. In addition to this, the absorption coefficient and refractive index were also estimated and discussed.

Dimensions

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