Effect of infrared pulsated laser on the structural and optical properties of PVA/Sn0.75Cr0.25S2 nanocomposite films

Abstract

A polyvinyl alcohol/tin chromium disulphide (PVA/Sn0.75Cr0.25S2) nanocomposite (NCP) was synthesized by the thermolysis and casting routes. The resulted effect of laser, within fluences 2–28 J/cm2, on the structural and optical characterization of PVA/Sn0.75Cr0.25S2 NCP, was inspected by using XRD, FTIR, and UV spectroscopes. Additionally, the optical bandgap reduced from 3.47 to 2.77 eV on increasing the fluence to 28 J/cm2, indicating the growth in disordered phase. This was convoyed with a rise in the refractive index values from 2.28 to 2.46, revealing the spreading of the Sn0.75Cr0.25S2 nanoparticles (NPs) into the PVA matrix that reduces the anisotropic character of the NCP samples. Moreover, any color variation between the pristine and exposed NCP samples (color intensity, ΔE) was computed; the results show that the NCP films have a response to color modifications by laser, since ΔE increases from 21.45 to 134.97. According to the resulting enhancement in the optical characteristics of the developed NCP, it may be a suitable candidate as a material that is used in optoelectronic devices.