The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 22 3 2022 11 22 Effect of antimony concentration on optical, electrical and structural properties of copper antimony sulphide thin films deposited by spray pyrolysis technique Effect of antimony concentration on optical, electrical and structural properties of copper antimony sulphide thin films deposited by spray pyrolysis technique 89 94 3291 10.47176/ijpr.22.3.71283 FA Nancy Obare Department of Physics, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya Victor Odari Department of Physics, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya Maxwel Mageto Department of Physics, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya. Materials Research Society of Kenya, P.O. Box 15653-00503 Nairobi, Kenya. 0000-0003-2720-6212 Journal Article 2021 07 18 Copper antimony sulphide (CuSbS₂) is a semiconductor with narrow band gap and a potential absorber material for applications in various optoelectronic devices like infrared detectors and solar cells. In this paper, CuSbS₂ thin films were deposited by spray pyrolysis technique on glass substrates at a temperature of 3000 ℃, using cupric chloride, antimony chloride, and thiourea as precursors. The samples were prepared by varying the antimony concentration (0.1M, 0.15M, and 0.2M) at a pressure of 3.5 bar and a solution flow rate of 2 ml/min for 5 minutes, while the precursor solutions of Cu:S molar ratio (0.1:0.2) was maintained. Elemental, morphological, optical, and structural characterization of these films was done from data obtained from energy dispersive X-ray fluorescence (EDXRF), UV-VIS spectrophotometer, scanning electron microscope (SEM) and X-Ray diffraction (XRD) respectively. The prepared thin films were polycrystalline with a preferential peak at (111).  Electrical properties of the thin films were obtained by simulating the UV-VIS spectra in SCOUT software using the Drude and Kim oscillator model. Deposited films have a band gap range of 1.84 – 1.98 eV, conductivity range of 199.59 – 204.67 Ω^-1cm^-1, and carrier concentration range of 1.12×10¹⁹ - 1.27×10¹⁹  cm^-3. Copper antimony sulphide (CuSbS₂) is a semiconductor with narrow band gap and a potential absorber material for applications in various optoelectronic devices like infrared detectors and solar cells. In this paper, CuSbS₂ thin films were deposited by spray pyrolysis technique on glass substrates at a temperature of 3000 ℃, using cupric chloride, antimony chloride, and thiourea as precursors. The samples were prepared by varying the antimony concentration (0.1M, 0.15M, and 0.2M) at a pressure of 3.5 bar and a solution flow rate of 2 ml/min for 5 minutes, while the precursor solutions of Cu:S molar ratio (0.1:0.2) was maintained. Elemental, morphological, optical, and structural characterization of these films was done from data obtained from energy dispersive X-ray fluorescence (EDXRF), UV-VIS spectrophotometer, scanning electron microscope (SEM) and X-Ray diffraction (XRD) respectively. The prepared thin films were polycrystalline with a preferential peak at (111).  Electrical properties of the thin films were obtained by simulating the UV-VIS spectra in SCOUT software using the Drude and Kim oscillator model. Deposited films have a band gap range of 1.84 – 1.98 eV, conductivity range of 199.59 – 204.67 Ω^-1cm^-1, and carrier concentration range of 1.12×10¹⁹ - 1.27×10¹⁹  cm^-3. https://ijpr.iut.ac.ir/article_3291_980a875ff6ef9c2d75e74307cbf5d205.pdf