Citation: |
Hassiba Rahal, Rafiaa Kihal, Abed Mohamed Affoune, Mokhtar Ghers, Faycal Djazi. Electrodeposition and characterization of ZnO thin films using sodium thiosulfate as an additive for photovoltaic solar cells[J]. Journal of Semiconductors, 2017, 38(5): 053002. doi: 10.1088/1674-4926/38/5/053002
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H Rahal, R Kihal, A M Affoune, M Ghers, F Djazi. Electrodeposition and characterization of ZnO thin films using sodium thiosulfate as an additive for photovoltaic solar cells[J]. J. Semicond., 2017, 38(5): 053002. doi: 10.1088/1674-4926/38/5/053002.
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Electrodeposition and characterization of ZnO thin films using sodium thiosulfate as an additive for photovoltaic solar cells
DOI: 10.1088/1674-4926/38/5/053002
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Abstract
Zinc oxide thin films have been grown by electrodeposition technique onto Cu and ITO-coated glass substrates from an aqueous zinc nitrate solution with addition of sodium thiosulfate at 90℃.The effects of sodium thiosulfate on the electrochemical deposition of ZnO were investigated by cyclic voltammetry and chronoamperometry techniques.Deposited films were obtained at-0:60 V vs.SCE and characterized by XRD, SEM, FTIR, optical, photoelectrochemical and electrical measurements.Thickness of the deposited film was measured to be 357 nm.X-ray diffraction results indicated that the synthesized ZnO has a pure hexagonal wurtzite structure with a marked preferential orientation along (002) plane.FTIR results confirmed the presence of ZnO films at peak 558 cm-1.SEM images showed uniform, compact morphology without any cracks and films composed of large flower-like ZnO agglomerates with star-shape.Optical properties of ZnO reveal a high optical transmission (>80%) and high absorption coefficient (α>105 cm-1) in visible region.The optical energy band gap was found to be 3.28 eV.Photoelectrochemical measurements indicated that the ZnO films had n-type semiconductor conduction.Electrical properties of ZnO films showed a low electrical resistivity of 6.54 Ω·cm, carrier concentration of-1.3×1017cm-3 and mobility of 7.35 cm2V-1s-1. -
References
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