Illumination effect on the structural and optical properties of nano meso nickel (II) tetraphenyl-21H, 23H-porphyrin films induces new two hours photo bleached optical sensor

El-Denglawey, A.

doi:10.1016/j.jlumin.2017.10.070

Cited by 25 publications

(27 citation statements)

References 41 publications

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“…M is a parameter that characterizes electronic transition form and takes 1/2 for direct transition permitted by ZnO. Therefore, Eg is calculated by extrapolating to α = 0 [73][74] the linear portion of the plot of (αhυ) 2 versus the photon energy hυ to α = 0 [73][74][75][76]. From Fig.…”

Section: 3-optical Measurements and Energy Gapmentioning

confidence: 99%

Electrical, photoluminescence and optical investigation of ZnO nanoparticles sintered at different temperatures

et al. 2021

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Section: 3-optical Measurements and Energy Gapmentioning

confidence: 99%

Electrical, photoluminescence and optical investigation of ZnO nanoparticles sintered at different temperatures

et al. 2021

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“…This observation provides more structural details (Warren 1953;Williamson and Hall 1953;El-Denglawey 2018). The amorphous hump contains three primary overlapping peaks, which can be identified with further UV illumination time.…”

Section: Structural Propertiesmentioning

confidence: 86%

“…The electronic transition types and other details are available at (Tauc 1976;Mott and Davis 1971;Pankove 1971;El-Denglawey 2018;Figà et al 2009). Tabulated values of E opt gi , E g and the constant A reveal a blueshift in the absorption edge because of the 4 and 8 h of UV illumination, as shown in Table 1 (El-Denglawey et al 2010).…”

Section: Absorption Coefficient Skin Depth and Optical Gap Calculationmentioning

confidence: 99%

“…1b. No sharp peaks can be identified, and only a hump within 2θ (13.8-37.4°) is observed, which characterizes the amorphous phase (Warren 1953;Williamson and Hall 1953;El-Denglawey et al 2020;El-Nahass et al 2016;El-Denglawey 2018;Soliman et al 2015). The structure of the NiTPP films is developed, and the crystalline structure is pronounced after 4 and 8 h of UV illumination.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…The absorption process occurs through this region, and direct or indirect electronic transitions may be available (Tauc 1976;El-Denglawey 2018;Mott and Davis 1971;Pankove 1971). No significant changes can be observed within the transparent or nonabsorbing region at λ > 750 nm (El-Denglawey et al 2020;Wemple and DiDomenico 1969;Mott and Davis 1971;Pankove 1971).…”

Section: T and R Characterizationmentioning

confidence: 99%

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Blueshifted dielectric properties and optical conductivity of new nanoscale nickel-(II)-tetraphenyl-21H,23H-porphyrin films as a function of UV illumination for energy storage applications

et al. 2021

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Pristine thermally evaporated nickel-(II)-tetraphenyl-21H,23H-porphyrin (NiTPP) thin films are amorphous, but after 4 and 8 h of UV illumination, the films become crystalline with preferred orientations of ( 112), ( 103) and ( 004) and crystallite sizes of (13, 18, 16) and (42, 31, 38) nm after 4 and 8 h, respectively. After UV illumination for 4 and 8 h, the NiTPP thin films are characterized by blueshifted absorption coefficients, increasing the optical and fundamental gap values and decreasing the dispersion parameter values. The dielectric properties display energy storage regions corresponding to the peak values of optical conductivity, which provides an elegant confirmation of the tailoring and tuning of band gaps, energy storage properties and optical conductivity by UV illumination time. Therefore, NiTPP films may be good candidates for environmental and energy storage applications.

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Infrared spectra of the main optical properties of poly(methyl methacrylate) thin films

Strugariu,

Șerban,

Berdie

et al. 2024

Polym. Bull.

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Infrared spectra are presented for the main optical properties of poly(methyl methacrylate) films. They are obtained from the complex permittivity using the Drude-Lorentz model for permittivity. This approach is original in obtaining the permittivity and then in obtaining the main optical properties of the polymer film. Classical dispersion analysis of the reflection-absorption spectrum of poly(methyl methacrylate) films cast on the metal mirror was used. Subsequently, the complex electric modulus, energy loss function, optical constants, absorption coefficient, penetration depth, dissipation factor, and complex optical conductivity were obtained from the complex permittivity.

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Illumination effect on the structural and optical properties of nano meso nickel (II) tetraphenyl-21H, 23H-porphyrin films induces new two hours photo bleached optical sensor

Cited by 25 publications

References 41 publications

Electrical, photoluminescence and optical investigation of ZnO nanoparticles sintered at different temperatures

Electrical, photoluminescence and optical investigation of ZnO nanoparticles sintered at different temperatures

Blueshifted dielectric properties and optical conductivity of new nanoscale nickel-(II)-tetraphenyl-21H,23H-porphyrin films as a function of UV illumination for energy storage applications

Infrared spectra of the main optical properties of poly(methyl methacrylate) thin films

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