Departments of Physics
Permanent URI for this collectionhttps://etd.hu.edu.et/handle/123456789/100
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Item INVESTIGATION OF STRUCTURAL AND OPTICAL PROPERTIES OF MANGANESE DOPED COPPER OXIDE THIN FILM SYNTHESIZED BY CHEMICAL BATH DEPOSITION METHOD(HAWASSA UNIVERSITY, 2024-11) DESALEGN FENTAHUN TADEGEThis study investigates the synthesis and characterization of manganese-doped copper oxide (CuMnO) thin films deposited onto glass substrates using the chemical bath deposition (CBD) method. The objective were to understand how varying manganese concentrations affect the structural and optical properties of the films. The process involved preparing solutions with varying manganese sulfate concentrations (1.5 ml, 3 ml, 4.5 ml, and 6 ml) and maintaining constant conditions for copper acetate, ammonia and hydrazine. The films were deposited at 50°C for 30 minutes, followed by annealing at a temperature of 300°C for 1 hours and 30 minutes. Structural analysis using X-ray diffraction (XRD) revealed that the films possessed a monoclinic copper manganese oxide and cubic Cu2O structure .The crystallite size initially increased with manganese concentration, reaching a maximum at 4.5 ml, before slightly decreasing. The dislocation density and strain showed corresponding trends, indicating improved crystal quality up to a certain concentration. Optical properties were assessed using UV-Vis spectroscopy. The band gap of the films increased from 1.7 eV to 1.9 eV as the manganese concentration rose from 1.5 ml to 6 ml. This shift in the band gap reflects the impact of manganese doping on the electronic structure of the films, potentially enhancing their suitability for optoelectronic applications. Overall, the results demonstrate that manganese doping effectively tunes the structural and optical characteristics of CuMnO thin films, offering insights into their potential use in various technological applications, including sensors and photovoltaic devices