Publication

Abstract : In this study, tin oxide (SnO), copper oxide (CuO), and their nanocomposite (SnO-CuO) were synthesised and characterised using hydrothermal method followed by calcination at 300°C, which significantly enhanced their physical and electronic properties. SEM and EDAX analyses revealed that SnO, CuO, and the composite exhibit a slightly agglomerated spherical morphology with crystal sizes of 72 nm, 60 nm, and 59 nm, respectively. The optical band gap of nano composite is 3.5 eV where bandgap of SnO is 2.8 eV, and CuO is 3.7 eV for powder sample. Electrical analysis of spin-coated thin films which annealed at 300°C for 2 hours, measuring measuring 0.65 μm,1.07 μm and1.45 μm thickness of three films, was conducted through I–V characteristics. The results indicate that the composite material exhibits outstanding conductivity and a significantly reduced resistivity of 0.00032 MΩ cm−1, which is considerably lower than that of SnO and CuO metal oxides. Comprehensive electrical studies of spin-coated thin film were conducted using an impedance analyser, included measurements of the Nyquist plot, dielectric permittivity, dielectric loss, conductivity, and modulus spectra. These studies confirms that SnO-CuO composite possesses superior electrical properties compared to the individual metal oxides.