Fabrication and tailored optical and electrical characteristics of Co2O3/SiC nanostructures doped PVA for multifunctional technological applications

The casting process was used to manufacture (PVA–Co 2 O 3 –SiC) nanocomposites from polyvinyl alcohol (PVA) with varying concentrations (0, 2, 4 and 6) wt% of cobalt dioxide (Co 2 O 3 ) and silicon carbide (SiC) nanoparticles, as potential materials for usage in different nanoelectronic optical devices such as transistors, solar cells, and electronic gates, among other uses. The dielectric and optical characteristics of (PVA–Co 2 O 3 –SiC) nanocomposites have been investigated. The optical characteristics of nanocomposites demonstrated that UV absorbance has high values. In addition, as the (Co 2 O 3 –SiC) nanoparticle concentration rises, the transmittance decreases. The energy gap E g of PVA decreased from 4.703 eV to 4.143 eV and from 4.369 to 3.519 eV for allowed and forbidden indirect transitions, respectively, when the ratio of (Co 2 O 3 –SiC) nanostructures reached (6 wt.%). This behavior may make it an excellent optical material for photonics applications. The optical parameters like the extinction coefficient k, absorption coefficient α, refractive index n, dispersion energy E d , oscillator energy E o , real ε 1 and imaginary ε 2 part of the dielectric constant, and optical conductivity σ op were evaluated. The dielectric characteristics of nanocomposites such as dielectric constant ε', dielectric loss ε", and A.C electrical conductivity σ ac of (PVA–Co 2 O 3 –SiC) nanostructures were investigated. Finally, the results indicated that the (PVA–Co 2 O 3 –SiC) nanostructures can be considered promising materials for optoelectronic nanodevices.