Microstructure analysis and nonlin­ear/linear optical parameters of polymer­ic composite fil­ms based PVAL for wi­de optical applicati­ons

Abstract

New proposed optical polymeric systems of PVAL/Cu particles have been synthesized by casting proceed to stand their NL (Nonlinear)/L (Linear) optical properties for various optical applications. Herein, the structure of the composites with various wt% of Cu was analyzed by the diffraction of X-ray (XRD) and FTIR. The semi-crystalline nature of PVAL has been influenced by Cu concentration as presented in XRD and Gaussian fitting. FTIR results confirm the strong interaction between Cu and polymer via the main hydroxyl group of the matrix. The morphological surfaces of pristine and doped PVAL have been measured. Optical measurement shows a redshift of the absorption edge. Moreover, the indirect transition bandgap decreased gradually with the Cu-level. This reflects the presence of localized states in the prohibited band facilities the electrons transition from HOMO to LUMO. The extinction coefficient and Urbach energy of the films have been enhanced. The ε o (static) and ε ∞ (high-frequency) dielectric variables are calculated. NL/L refractive index and susceptibility are estimated from the bandgap values. The optical limiting of the composite films has been tested using a green diode laser and He-Ne laser. The PVAL sample with high Cu wt% is an optical system capable of different technical applications, such as solar cells, optoelectronic devices, electronic apparatus, and optical filters.

Impact of Mn–Ni spinal ferrite nanoparticles on the structural, morphological, surface roughness, and optical parameters of polyvinyl alcohol for optoelectronic applications

“…For the pure PVA, distinct peaks are observed at 3351 cm −1 (stretching vibration of OH groups), 2952 cm −1 (CH asymmetric stretching of CH 2 ), 2831 cm −1 (CH symmetric stretching of CH 2 ), 1717 cm −1 (CO stretching), 1656 cm −1 (CC stretching), 1565 cm −1 (O–H&C–H bending modes), 1471 cm −1 (bending of CH 2 vibration), 1135 cm −1 (C–O stretching), 845 cm −1 (CH 2 stretching), and 920 cm −1 (C–C stretching). 38–40 After the insertion of Mn 0.4 Ni 0.6 Fe 2 O 4 NPs into the matrix, the band intensity changed, and the position of some bands slightly shifted. The observed peak related to the OH group at 3351 cm −1 was shifted to 3332, 3331, 3328, and 3355 cm −1 for 1, 2, 3, and 4%, respectively.…”

“…The addition of Mn 0.4 Ni 0.6 Fe 2 O 4 NPs to the matrix causes an increase in the charge carriers and of course increasing the material density and polarization, which leads to a rise in the index of refraction. 39,51 K indicates the amount of energy lost due to absorption or scattering from the polymer films. The interaction between light photons and electrons causes the K value to increase as the wavelength increases (Fig.…”

“…For the pure PVA, distinct peaks are observed at 3351 cm À1 (stretching vibration of OH groups), 2952 cm À1 (CH asymmetric stretching of CH 2 ), 2831 cm À1 (CH symmetric stretching of CH 2 ), 1717 cm À1 (CQO stretching), 1656 cm À1 (CQC stretching), 1565 cm À1 (O-H&C-H bending modes), 1471 cm À1 (bending of CH 2 vibration), 1135 cm À1 (C-O stretching), 845 cm À1 (CH 2 stretching), and 920 cm À1 (C-C stretching). [38][39][40] After the…”

“…138, 2.397, 2.897, and 3.770 for 1, 2, 3, and 4% Mn 0.4 Ni 0.6-Fe 2 O 4 , respectively. The addition of Mn 0.4 Ni 0.6 Fe 2 O 4 NPs to the matrix causes an increase in the charge carriers and of course increasing the material density and polarization, which leads to a rise in the index of refraction 39,51. K indicates the amount of energy lost due to absorption or scattering from the polymer films.…”

Structural, Opto-Physical, Photoluminescence, and Optical Limiting Properties of Polyvinyl (Pyrrolidone and Alcohol) Blend Film Doped with Co-Metal

“…The analysis of the absorption coefficient is essential to investigate the changes in the band structure of polymeric material [38][39][40][41]. In addition, it gives valuable information about the energy of the optical prohibited gap.…”