Nonlinear behavior of the current–voltage characteristics for erbium-doped PVA polymeric composite films

Elsaeedy, H.I.; Ali, H. Elhosiny; Algarni, H.; Yahia, I.S.

doi:10.1007/s00339-018-2375-x

Cited by 36 publications

(18 citation statements)

References 28 publications

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“…This improvement was correlated to the increase in the localized stage densities in the band structure. In other words, it can be said that AgNPs modified the functional composite structure because of the intra-band transitions of conduction electrons [ 41 ]. The characteristics of the inter-band optical transitions changed due to the variations in structural properties, which have a significant influence on electrons/holes, generating specific dispersion parameters [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Flexible Methyl Cellulose/Polyaniline/Silver Composite Films with Enhanced Linear and Nonlinear Optical Properties

et al. 2021

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In order to potentiate implementations in optical energy applications, flexible polymer composite films comprising methyl cellulose (MC), polyaniline (PANI) and silver nanoparticles (AgNPs) were successfully fabricated through a cast preparation method. The composite structure of the fabricated film was confirmed by X-ray diffraction and infrared spectroscopy, indicating a successful incorporation of AgNPs into the MC/PANI blend. The scanning electron microscope (SEM) images have indicated a homogenous loading and dispersion of AgNPs into the MC/PANI blend. The optical parameters such as band gap (Eg), absorption edge (Ed), number of carbon cluster (N) and Urbach energy (Eu) of pure MC polymer, MC/PANI blend and MC/PANI/Ag films were determined using the UV optical absorbance. The effects of AgNPs and PANI on MC polymer linear optical (LO) and nonlinear optical (NLO) parameters including reflection extinction coefficient, refractive index, dielectric constant, nonlinear refractive index, and nonlinear susceptibility are studied. The results showed a decrease in the band gap of MC/PANI/AgNPs compared to the pure MC film. Meanwhile, the estimated carbon cluster number enhanced with the incorporation of the AgNPs. The inclusion of AgNPs and PANI has enhanced the optical properties of the MC polymer, providing a new composite suitable for energy conversion systems, solar cells, biosensors, and nonlinear optical applications.

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Section: Resultsmentioning

confidence: 99%

Flexible Methyl Cellulose/Polyaniline/Silver Composite Films with Enhanced Linear and Nonlinear Optical Properties

et al. 2021

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“…It does not contradict the previously obtained results. 14,15,29,30 Figure 4 shows the surface morphology of PVA films untreated and after plasma treatment. These measurements enable the surface roughness as R q .…”

Section: Morphologymentioning

confidence: 99%

“…However, nonlinear behavior can be characteristic for back Schottky diodes or varistors. 14,15,[36][37][38]…”

Section: Electrical Propertiesmentioning

confidence: 99%

“…In particular, PVA/metal oxide or PVA/metal ion composites have excellent thermal, luminescence, optoelectronics, dielectric, and photocatalytic properties. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Depending on the properties of metal oxides, researchers try to obtain a composite polymer with the desired properties. For example, nanocomposites based on PVA/ZnO are considered as components of optoelectronics, photoelectronics, and photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

“…[17][18][19] For improving the optical properties of the composites, lanthanide ions are introduced. 14,15 Different methods are used, such as sol-gel, 10,11 solving casting method, 3,[5][6][7][8][9][20][21][22][23] freeze-thawing procedure, 24 and laser ablation 25 for producing composites on the base of PVA with metal oxides. In all methods, except for laser ablation, metal oxides are synthesized separately, or ready-made ones are added to the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Khlyustova

Sirotkin

Краев

et al. 2021

J of Applied Polymer Sci

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Flexible electronics require materials with high breakdown strength, high dielectric constant, and thermal stability. These conditions are met by composites based on polymers and metal oxides. In this article, we present a new onestep method for producing composites based on water-soluble polyvinyl alcohol (PVA) and metal oxides (AlOOH, CuO, and ZnO). The source of oxides is underwater plasma. The oxides are introduced into the polymer matrix when plasma is exposed to the polymer solution. The results of X-ray, IR, and SEM analysis showed that metal oxides are embedded in the polymer. Differential scanning calorimetry measurements have shown that the glass transition temperature depends on the oxide being incorporated. The electrical properties of polymer composites were studied by current-voltage characteristics. Dielectric properties were measured in the range of 25-10 6 Hz. The properties of obtained PVA + metal oxide showed that using underwater plasma is a suitable method for producing composites for electronic devices.

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Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

Mohammed

Yahia

El‐Mongy

2023

J of Applied Polymer Sci

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The simple solution casting method was utilized for preparing composite films (PVA-30 wt% PVP) incorporated with various content of erbium ions (Er 3+ ) (0.11, 0.37, 1.85, 3.7, 9.25, and 18.5) wt%. The composite films' properties were investigated using XRD, UV-Vis, and dielectric spectrometers. The XRD patterns showed a noticeable decline in structural elements, including crystallinity level. The transmittances of the investigated samples decrease as Er 3+ increases. Studies on UV-Vis absorption have revealed that the UV-Vis absorption spectra are shifting to the higher wavelengths, causing a decrease in the optical energy bandgap values from 4.66 to 3.48 eV for an indirect transition and from 5 to 4.84 eV for a direct transition, which suggests that the filler interacts with the blend matrix. As the number of localized states in the forbidden energy bandgap rises, it has been shown that with increasing Er 3+ -the estimated Urbach's energy increases from 1.95 to 32 meV. The addition of erbium ions raises the refractive index of the blend film. The optical limits of the samples are investigated using a He-Ne laser beam with a wavelength of 632.8 nm and a solid-state green diode laser beam with a wavelength of 532 nm. The prospect of greater charge carrier concentration and mobility was confirmed by increased AC conductivity with increasing frequency. Dielectric permittivity and dielectric loss tangent were utilized to analyze dielectric behavior. The analysis of the electric modulus (M 0 and M 00 ) of as-prepared samples has been completed. These findings are anticipated to notably impact a broad spectrum of applications, including organic semiconductors, optoelectronic devices, polymer solar cells, and polymer waveguides. K E Y W O R D Sdielectric characteristics, erbium ions (Er 3+ )-doped PVA/PVP, optical limiting/CUT-OFF laser filters, refractive index-bandgap analysis, XRD/FTIR

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Nonlinear behavior of the current–voltage characteristics for erbium-doped PVA polymeric composite films

Cited by 36 publications

References 28 publications

Flexible Methyl Cellulose/Polyaniline/Silver Composite Films with Enhanced Linear and Nonlinear Optical Properties

Flexible Methyl Cellulose/Polyaniline/Silver Composite Films with Enhanced Linear and Nonlinear Optical Properties

Effect of metal oxides added onto polyvinyl alcohol via pulsed underwater plasma on their thermal, electrical and dielectric properties

Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

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