Improving microstructural properties and minimizing crystal imperfections of nanocrystalline Cu 2 O thin films of different solution molarities for solar cell applications

Akl, Alaa A.; Mahmoud, Safwat A.; Al-Shomar, Shereen M.; Hassanien, Ahmed Saeed

doi:10.1016/j.mssp.2017.10.007

Cited by 113 publications

(38 citation statements)

References 81 publications

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“…While the dislocation density ( δ ) was used to define the length of dislocation lines per unit volume. Moreover, δ represents the number of defects in the film and is estimated as δ = 1/ D 2 . The strain ( ε ) in the film microstructure is evaluated as ε = β cos θ /4 .…”

Section: X‐ray Diffraction Analysismentioning

confidence: 99%

Optical and structural properties of (PANI‐CSA‐PMMA)/NiNPs nanocomposites thin films for organic optical filters

Jum’h

Mousa

Mhawish

et al. 2019

J of Applied Polymer Sci

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Synthesized nanocomposite of protonated polyaniline with camphorsulfonic acid (PANI-CSA) hosted in poly(methyl methacrylate) (PMMA) and incorporated with nickel nanoparticles (NiNPs) were coated as thin films on activated fused silica substrates using oxygen-plasma and spin coating techniques. Weight percent ratios of 0, 10, 20, 30, 60, and 90% of NiNPs with respect to PANI-CSA thin films have been studied in order to investigate the optical, structural, and morphological properties of (PANI-CSA-PMMA)/ NiNPs by employing UV-Vis spectrometer, XRD, scanning electron microscopy (SEM), contact angle (CA) goniometry, impedance analyzer, and thermogravimetric analysis. Deduced refractive indices (n) from UV-Vis data were in the range from 1.5 up to 2.2. SEM micrographs show the typical crystalline structure of PANI was vanishing gradually with increasing the NiNPs content. Optical properties such as refractive index (n), extinction coefficient (k), absorption coefficient (α) as well as the band-gap energies (E g ) were mathematically deduced throughout the experimental transmittance and absorbance UV-Vis spectra. Calculated refractive indices (n) were in the range from 1.5 up to 2.2. Optical band-gap energies decrease in a monoexponential decay for samples up to 60% NiNPs/PANI-CSA, samples with 90% concentration had substantial drop in its value due to the NiNPs percolations. The incorporation with NiNPs leads to the development of a new morphological states (sheet-like heterostructure) which start to be obvious at 30%, at this concentration the CA was maxima (54 ), at this concentration and the crystallite size are maximum and the CA was maximum (highest hydrophobicity).

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Section: X‐ray Diffraction Analysismentioning

confidence: 99%

Optical and structural properties of (PANI‐CSA‐PMMA)/NiNPs nanocomposites thin films for organic optical filters

Jum’h

Mousa

Mhawish

et al. 2019

J of Applied Polymer Sci

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“…[43]. We calculated the density of dislocations (δ) by using the line profile analysis of X-ray diffractions (LPA-XRD) and using simple Williamson-Smallman formula given by δ = 1/D 2 [33,[43][44][45][46], where D is the value of the crystallite size. Figure 4a shows the dislocation density of the undoped ZnO film and the Fe-Ni co-doped ZnO thin films as a function of Fe-Ni concentrations.…”

Section: Dislocation Density and Crystalline Densitymentioning

confidence: 99%

“…The value of the strain energy density within thin films (E d ) [J/m 3 ] depends on the Young's modulus of the film, the volume of the unit cell (V) and the internal micro strain, ε . The strain energy density can be expressed as [44,52],…”

Section: Crystal Imperfections Studiesmentioning

confidence: 99%

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Optical, Structural, and Crystal Defects Characterizations of Dip Synthesized (Fe-Ni) Co-Doped ZnO Thin Films

et al. 2020

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Sol-gel technique is used to synthesize as-grown zinc oxide (ZnO) and iron-nickel (Fe-Ni) co-doped ZnO thin films deposited on glass substrates using dip coating technique. The structural properties and crystal imperfections of as-prepared thin films are investigated. We performed the structural analysis of films using X-ray diffraction (XRD). The XRD analysis reveal that the as-prepared films exhibit wurtzite structure. Furthermore, XRD-line profile analysis is performed to study the correlation between structural properties and imperfections of the nanocomposite thin films. The crystallite size and microstrains parameters are predicted using the Williamson–Hall method. We found that the crystallites size increases as the co-doped (Fe-Ni) concentration is increased. However, microstrains of the nanocomposite films decreases as (Fe-Ni) concentration is increased. The optical properties of the (Fe-Ni) co-doped nanocomposite films are investigated by performing UV-Vis (250 nm–700 nm) spectrophotometer measurements. We found that as the (Fe-Ni) concentration level is steadily increased, transmittance of the undoped ZnO thin films is decreased. Remarkably, refractive index of undoped ZnO thin films is found to exhibit values extending from 1.55 to1.88 that would increase as (Fe-Ni) concentration is increased.

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“…These minute changes in the material may be influence on the catalytical and desired substantial properties. Literature also reports that these minute defects leads to decrease the sensing and adsorption related properties of solid materials [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of firing temperature on structural and electrical parameters of synthesized CeO2 thick films

Singh¹,

Koli²,

Jagdale³

et al. 2019

SN Appl. Sci.

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In this work, the Ceria (CeO 2) was synthesized by co-precipitation method. The thick films of synthesized CeO 2 were prepared by screen printing technique. Films were fired at 350 °C, 400 °C, 450 °C for 2 h in muffle furnace. These films were characterized by XRD to investigate the structural properties of prepared material. The XRD confirmed the single phase cerium oxide nanoparticles. Scanning electron microscopy was utilized for the morphological parameters of prepared cerium oxide nanoparticles. The cubic shaped cerium nanoparticles with various diameters were observed from SEM images. The elemental composition of ceria was studied by EDS, where the perfect elemental composition of ceria was confirmed. The Fourier transform infra red spectroscopy was employed to find out metal-oxide vibrational bands in the cerium oxide nanoparticles. The effect of firing temperature was studied for cerium oxide calcined at 350 °C, 400 °C and 450 °C nanoparticles to study the various parameters such as Grain Size, Temperature Coefficient (T C), Stacking Fault Probability (α), Dislocation Density (ρ), Surface area, Activation Energy and RMS Microstrain (e).

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Improving microstructural properties and minimizing crystal imperfections of nanocrystalline Cu 2 O thin films of different solution molarities for solar cell applications

Cited by 113 publications

References 81 publications

Optical and structural properties of (PANI‐CSA‐PMMA)/NiNPs nanocomposites thin films for organic optical filters

Optical and structural properties of (PANI‐CSA‐PMMA)/NiNPs nanocomposites thin films for organic optical filters

Optical, Structural, and Crystal Defects Characterizations of Dip Synthesized (Fe-Ni) Co-Doped ZnO Thin Films

Effect of firing temperature on structural and electrical parameters of synthesized CeO2 thick films

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