Structural and optical properties of nanocrystalline platinum octaethylporphyrin (PtOEP) thin films

Abuelwafa, Amr Attia; El-Denglawey, A.; Dongol, M.; El-Nahass, M.M.; Soga, Tetsuo

doi:10.1016/j.jallcom.2015.09.180

Cited by 45 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulted values of ε L and N m * are 19.66 and 4.62 ×10 57 m −3 Kg −1 , respectively. The values of ε L are higher than ε ∞ which can be owing to the free charge carrier influence in the polarization process that is occurred within the material through exposure to light [30].…”

Section: Resultsmentioning

confidence: 93%

See 1 more Smart Citation

Morphological, structural, and optical properties of flexible Tin Oxide(II) thin film via thermal evaporation technique

et al. 2022

View full text Add to dashboard Cite

Tin oxide compounds have been highly studied due to their important properties. Tin Oxide (II) SnO compound is considered an ideal p-type conductive material, with large p-type carrier mobility. It is getting a lot of attention in next-generation electronic applications. In this work, the SnO thin film was deposited on the polyethylene terephthalate (PET) substrate by the thermal evaporation method. The X-ray diffraction pattern revealed the amorphous structure of the SnO/PET thin film. The purity of the SnO/PET film was confirmed using the Raman spectrum. An atomic force microscope was carried out to investigate the topography (roughness and particle size) of the obtained SnO thin film. The optical band gap $$E_{{\text{g}}}^{{{\text{Opt}}}}$$ E g Opt for SnO/PET thin film in the absorption region was estimated using Tauc’s equation. The refractive index for the SnO/PET thin film was estimated at the normal dispersion range by a single oscillator model. The dielectric optical properties of the SnO/PET thin film were estimated. The calculated third-order nonlinear susceptibility χ(3) and nonlinear refractive index n(2) were in the order of ~ 10−10 and ~ 10−9esu, respectively, within the photon energy range (0.5 to 4 eV). The Sheik–Bahae model was used to determine the nonlinear absorption coefficient βc for SnO/PET thin film. Based on these detailed results, the high nonlinear optical parameters pave the way for the probability of using the SnO/PET in flexible optoelectronics devices. Graphical abstract

show abstract

Section: Resultsmentioning

confidence: 93%

“…The polarizability of a material that relies on the density of states inside the prohibited gap can be expressed by the dielectric constant. The real part and imaginary part (dielectric constant, ε 1 , and dielectric loss, ε 2 ) for SnO thin film can be estimated by the following relations [17,30]:…”

Section: Resultsmentioning

confidence: 99%

Morphological, structural, and optical properties of flexible Tin Oxide(II) thin film via thermal evaporation technique

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Additionally, energy loss due to free charge carriers travelling through the bulk material (VELF) is greater than energy loss due to free charge carriers traversing through the surface at certain peaks that define the C6 thin film (SELF). The real σ 1 and imaginary σ 2 parts of the optical conductivity can be determined using the ε 1 and ε 2 parts of the dielectric constant as stated by following expressions 28,54 :…”

Section: Dielectric Characterizationmentioning

confidence: 99%

Structural and Optical Properties of Nanocrystalline 3-(2-Benzothiazolyl)-7-(diethylamino) Coumarin (C6) Thin Films for Optoelectronic Application

Ebied

Dongol

Elhaes

et al. 2022

J. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

In the current work, the structural and optical properties of thermally evaporated 3-(2-Benzothiazolyl)-7-(diethylamino) coumarin [Coumarin 6 (C6)] thin films on a pre-cleaned quartz substrate were studied as a function of the annealing temperature. The influence of annealing on the structural, morphological, and molecular structures was investigated by x-ray diffraction (XRD), atomic force microscopy (AFM), and Fourier transform infrared (FTIR) spectroscopy, respectively. The XRD and AFM results confirmed that the as-deposited and annealed films have nanostructural features (30.96–45.34 nm). Also, the increase in roughness of the C6 thin film surface resulted from particle agglomeration and coalescence. Optical constants of C6 thin films were derived from the transmittance T(λ) and reflectance, R(λ) measurements in the spectral range of 200–2500 nm. Analysis of the optical absorption coefficient data indicates that the type of electronic transition in these films is an indirect allowed transition. The estimated optical band gap was decreased from 2.12 eV to 2.01 eV as the annealing temperature was increased. Dispersion and dielectric parameters were determined as functions of the annealing temperature. Lastly, nonlinear optical parameters such as the third-order nonlinear susceptibility, χ(3) and nonlinear refractive index, n(2) were estimated and influenced by annealing temperature. The optical properties of C6 thin films were showed that C6 thin films would be used in a wide range of photonic applications Graphical Abstract

show abstract

“…As the functional part, sensing film is mainly composed of fluorescent indicators and a matrix. Transition metal complexes, especially metalloporphyrin, such as Pt (II) complexes [ 11 , 12 ], are often used as indicators due to their long fluorescence lifetime, intense phosphorescence, and large Stokes’ shift (about 100–200 nm) [ 13 , 14 , 15 ]. These features are suitable for phase modulation systems and enable the separation of the excitation light signal from the fluorescence signals via a detection device.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Sensitivity and Dynamic Range of Optical Oxygen Sensing Films by Blending Various Polymer Matrices

Zhang

et al. 2021

Biosensors

View full text Add to dashboard Cite

In this work, eight different types of optical oxygen sensing films were prepared by impregnating indicator and matrix solution on the surface of a polypropylene microporous filter membrane. The polymer matrix of the sensing films was ethyl cellulose (EC), polymethyl methacrylate (PMMA), and their blends with different mixing ratios. Scanning electron microscopy (SEM), laser confocal microscopy, and fluorescence spectrometer were used to investigate the morphologies and optical properties of the sensing films. Phase delay measurements under different oxygen partial pressures (PO2) and temperatures were applied to investigate the analytical performances of the sensing film for gaseous O2 monitoring. Results show that the response time of all the sensing films was extremely fast. The sensitivities and dynamic ranges of the sensing films with the blended polymer matrix were separately decreased and increased as the EC/PMMA ratio decreased, and the S-V curve of the sensing films blended with equal content of EC and PMMA exhibited good linearity under different temperatures, showing a promising prospect in practical application.

show abstract

Structural and optical properties of nanocrystalline platinum octaethylporphyrin (PtOEP) thin films

Cited by 45 publications

References 53 publications

Morphological, structural, and optical properties of flexible Tin Oxide(II) thin film via thermal evaporation technique

Morphological, structural, and optical properties of flexible Tin Oxide(II) thin film via thermal evaporation technique

Structural and Optical Properties of Nanocrystalline 3-(2-Benzothiazolyl)-7-(diethylamino) Coumarin (C6) Thin Films for Optoelectronic Application

Tuning the Sensitivity and Dynamic Range of Optical Oxygen Sensing Films by Blending Various Polymer Matrices

Contact Info

Product

Resources

About