Impact of CuO nanofiller on structural, optical and dielectric properties of CuO/DGEBA hybrid nanocomposites for optoelectronic devices

In this work, Copper oxide nanofiller with different contents (0.05, 0.5, 1, and 2 wt% CuO) were embedded in DGEBA epoxy matrix using ultrasonic wave and casting processing technique. This study deals to assess and investigate the CuO fillers impact on various properties of CuO/DGEBA hybrid polymer nanocomposites (CuO/DGEBA-HPNCs). The structural modifications were tracked using X-ray diffraction (XRD) patterns and Fourier transform infrared spectra. XRD profiles demonstrated that the crystallinity of samples increases with an increase of CuO nanoparticles (CuO NPs) contents, which improved the crystallinity of CuO/DGEBA-HPNCs. The interplanar distance, particle size, and the average inter-crystalline separation were also calculated and investigated. Interactions between CuO NPs and DGEBA polymer matrix were reported using the correlated FTIR analysis and XRD results, which was related to the formation of new absorption bands for the 1 wt% and 2 wt% CuO NPs samples. The UV-Vis investigation showed that the absorption edge values exhibited a red-shift with the rise in CuO NPs, due to interactions between the doping and the DGEBA matrix owing to the formation of charge transfer. Furthermore, the dielectric characteristics such as dielectric permittivity (e ', e ''), electrical modulus (M ', M ''), and dielectric AC impedance (Z ', Z '') of the CuO/DGEBA-HPNCs were performed at room temperature as a function of CuO nanofiller contents and frequency. Experimental modulus data were successfully fitted to Havriliak-Negami model. AC impedance spectroscopy was carried out to disclose the CuO/DGEBA-HPNCs as a function of various CuO NPs fillers. The obtained dielectric parameters, using fitting curves, were altered by the CuO NPs filler concentration. The results showed the ability to use the samples in optoelectronic devices.