The structure analysis and optical performance of PVA films doped with Fe<sup>3+</sup>-metal for UV- limiter, and optoelectronics

Ali, H. Elhosiny; Abdelaziz, M.; Algarni, H.; Yahia, I.S.

doi:10.1088/2053-1591/ab2668

Cited by 19 publications

(26 citation statements)

References 34 publications

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“…This notice indicates that the disordered formation occurs through the bonding of ‐OH in the PVAL system 20 . Another band occurred at 1712 and 1660 cm −1 are for absorption bands of C=O stretching and ‐OH bendingvibrations 22 . Furthermore, at 1438 and 1370 cm −1 , the absorption bands observed are associated with bending and wagging of CH 2 vibrations, respectively.…”

Section: Resultsmentioning

confidence: 85%

“…The sample's UV‐Vis spectra behaviors are evaluated in the range of 200 to 800 nm for different Li + ‐ion concentrations, as shown in Figure 6A,B. First, it is evident in Figure 6A that in the electrolyte specimen PVAL:0.04 wt% Li + ‐ions, a noticeable transmission shoulders at ~274.81 and ~327.60 nm in the UV region which are due to as the electronic shift π‐π * ( k ‐band) of the [CH=CH] 3 and C=O carbonyl group, respectively 22 . For other PVAL:Li + ‐ion electrolyte, the two absorption peaks also exist by increasing the lithium nitrate content from 0.19 wt% to 4 wt%, which refers to the high UV absorption.…”

Section: Resultsmentioning

confidence: 92%

“…In the visible region, the optical transmission decreased from ~91.76% for the polymer film of pure PVAL to ~77.28% of the electrolyte sample PVA:4 wt% Li + ‐ions. This can be explained by creating intermolecular hydrogen bonds between the hydroxyl group and Li + ‐ions, which leads to the creation of new levels in the energy gap with increasing the LiNO 3 content 22 . The decline in optical transmission causes arise in the absorption of the polymer samples, which denotes a change to the optical energy gap 26 .…”

Section: Resultsmentioning

confidence: 99%

“…The transmission spectrum can be divided relatively into two areas: a transparent spectrum with low absorption in the visible region and a strong absorption area in the ultraviolet region where transmission is significantly reduced due to the absorption coefficient effect 27 . Many reports have shown this result based on the percentage of doping, such as Tb 3+ , Fe 3+ , and Er 3+ within the structure of PVAL polymer 19,22,28 …”

Section: Resultsmentioning

confidence: 99%

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Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Ali

Abdelaziz

Nawar

et al. 2020

Polymers for Advanced Techs

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In this paper, pure and 0.04%, 0.19%, 0.4%, 1.9%, and 4% LiNO3‐doped PVAL (polyvinyl alcohol) electrolyte were fabricated in the form of solid films by the casting process. The influence of Li+‐ions on PVAL was identified by some characterization tools such as X‐ray diffraction, FT‐IR (Fourier transform infrared), scanning electron microscope (SEM), thermal gravimetric analysis (TGA), UV‐visible‐NIR spectroscopy, dielectric, and conductivity measurements. X‐ray diffraction studies indicate that the semicrystalline of PVAL and the calculated crystallize size from Gaussian fitting were decreased with Li+‐ions concentration. FT‐IR results indicate that there is strong interaction among doping ions and the matrix. The surface morphology of the electrolyte films was studied via SEM. The optical studies demonstrate that the transmittance of films decreased with the rising of Li+‐ions. Urbach's energy and bandgap are also reduced with adding more ions. Different empirical equations were used to study the relation between the energy gap and the refractive index. The index of refraction of the films has average values in 2.024 to 2.078 range. Li+‐ion concentrations critically influenced the factors of nonlinearity. The calculated values of nonlinear optical susceptibility χ(3) and refractive index n2 were increased from 8.6 × 10−13 esu and 1.55 × 10−11 to 20.56 × 10−10 esu and 2.05 × 10−11, respectively. The dielectric constant and loss measurements of the PVAL embedded with 4% of LiNO3 (SPL‐5) were decreased exponentially with increasing the incident frequency. The AC electrical conductivity (σAC) and nonlinear I‐V curves are enhanced by increasing the Li+‐ion contents. The electrical current was increased with small resistivity for SPL‐5 film. The studied films have an inimitable result in various fields, such as nonlinear optical and varistor devices.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Ali

Abdelaziz

Nawar

et al. 2020

Polymers for Advanced Techs

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“…In this experiment, the optical absorption value for pure PVA was not measured, but previous studies showed that the optical absorption peak for pure PVA was also in the UV region [ 37 , 38 ]. The blending of H 3 PO 4 into PVA was expected to form of the complex PVA–H 3 PO 4 , which can be evaluated by IR, NMR and XRD spectra [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Susilawati

Prayogi²,

Arif

et al. 2021

Polymers

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This study assesses the optical properties and conductivity of PVA–H3PO4 (polyvinyl alcohol–phosphoric acid) polymer film blend irradiated by gamma (γ) rays. The PVA–H3PO4 polymer film blend was prepared by the solvent-casting method at H3PO4 concentrations of 75 v% and 85 v%, and then irradiated up to 25 kGy using γ-rays from the Cobalt-60 isotope source. The optical absorption spectrum was measured using an ultraviolet–visible spectrophotometer over a wavelength range of 200 to 700 nm. It was found that the absorption peaks are in three regions, namely two peaks in the ultraviolet region (310 and 350 nm) and one peak in the visible region (550 nm). The presence of an absorption peak after being exposed to hυ energy indicates a transition of electrons from HOMO to LUMO within the polymer chain. The study of optical absorption shows that the energy band gap (energy gap) depends on the radiation dose and the concentration of H3PO4 in the polymer film blend. The optical absorption, absorption edge, and energy gap decrease with increasing H3PO4 concentration and radiation dose. The interaction between PVA and H3PO4 blend led to an increase in the conductivity of the resulting polymer blend film.

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Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

Ismail

Nasr

2021

J of Applied Polymer Sci

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Structural, optical and photodegradation performance of PVDF/PVA polymer blend doped with different concentration of NiO NPs were studied using casting technique method. The effect of adding NiO NPs on PVDF/PVA are investigated using X-ray Diffraction (XRD), High Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared-Attenuated Total Reflection (FTIR-ATR), Ultraviolet-Visible Spectroscopy (UV-Vis), and High Resolution Scanning Electron Microscope (HRSEM). XRD results showed that the addition of NiO NPs increase the crystallinity of PVDF/PVA. The appearance and shifting of bands in FTIR-ATR indicate the structural change in the PVDF/PVA with adding NiO NPs combined with decrease in the band gap of nanocomposite films compared to pure blend in UV-Vis confirmed the incorporation of NiO NPs in PVDF/PVA. HRTEM shows

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The structure analysis and optical performance of PVA films doped with Fe³⁺-metal for UV- limiter, and optoelectronics

Cited by 19 publications

References 34 publications

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

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The structure analysis and optical performance of PVA films doped with Fe3+-metal for UV- limiter, and optoelectronics

Cited by 19 publications

References 34 publications

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li+‐ions for multifunctional devices

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li+‐ions for multifunctional devices

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Structural characterization of PVDF/PVA polymer blend film doped with different concentration of NiO NPs for photocatalytic degradation of malachite green dye under visible light

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The structure analysis and optical performance of PVA films doped with Fe³⁺-metal for UV- limiter, and optoelectronics

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices

Structural, electrical, and nonlinear optical performance of PVAL embedded with Li⁺‐ions for multifunctional devices