Investigation on optical properties and electrical conductivity behavior of Chitosan/PVP/Se NPs NPs composite produced via one-potential laser ablation for optoelectronic applications

Chitosan/Poly (Vinyl Pyrrolidone) composite scattered by selenium nanoparticles has been produced by laser ablation. XRD scans of Chitosan/PVP/Se NPs show the characterized peaks of Se NPs. ATR-FTIR data approved the complexation between Chitosan/Poly Vinyl Pyrrolidone blend and selenium nanoparticles. Optical properties confirm that Se NPs tends to increase for direct transition band gap changes which changes from (4.8 eV to 5.1 eV) and for indirect transition (4.2 eV to 4.7 eV). Moreover, the shift in optical energy band gap measurements verifies the presence of scattering selenium nanoparticles in Chitosan-Poly Vinyl Pyrrolidone film. The morphology of selenium nanoparticles via SEM shows as spherical white points distributed on the surface of the blend. Values of ε' and ε" are obtaining a noticeable increase with increasing the content of Se NPs. As the laser ablation time, the AC conductivity values increased as well. The analysis indicates that adding selenium NPs into (Chitosan-Poly Vinyl Pyrrolidone) improved the electrical conductivity behavior of the composite, implying that it might be employed in optoelectronic devices.