Gamma radiation-induced changes on the structural and optical properties of aluminum phthalocyanine chloride thin films

El-Nahass, M.M.; Khalifa, B.A.; Soliman, I.M.

doi:10.1016/j.optmat.2015.04.010

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…The defects can lead to band bending at the crystallite boundaries, affecting energy band gap, increasing the conductivity of irradiated thin films 47 . This finding is in agreement with other previous studies 9, 24,34,42 .…”

Section: Optical Properties Of Tips Pentacene Thin Filmsupporting

confidence: 94%

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Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

et al. 2022

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This study investigates the effects of Gamma-irradiation on the structural, morphological and optical properties of 3,16-bis(tri isopropyl silylethynyl)pentacene (TIPS Pentacene) organic semiconductor films. The TIPS Pentacene thin films were irradiated at 10 to 300 kGy at a dose rate of 1.58 kGy/hr. The films were characterized using X-Ray Diffractometer (XRD), Atomic Force Microscopy (AFM) and Ultraviolet-Visible Spectroscopy (UV-Vis). The XRD analysis showed that the pre-irradiated thin films were of crystalline structure, indicating a broad wave diagram. The XRD and AFM results show that these variations can be attributed to the radiation-induced local heating and microscopic atomic mobility. Based on the UV-Vis results, the thin films exhibit approximately 70% optical transmittance in the visible region at pre-irradiation. At post-irradiation, optical transmittance decreased to 55% at the maximum absorbed dose. The corresponding optical bandgap decreased from 1.87 to 1.50 eV after a total ionizing dose of 300 kGy. The findings showed that TIPS Pentacene thin film has good mitigation towards gamma irradiation and can withstand harsh radiation while retaining its semiconductor properties. It is a potential candidate for flexible electronics for space applications.

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Section: Optical Properties Of Tips Pentacene Thin Filmsupporting

confidence: 94%

“…As the intensity becomes wider, the crystal quality of thin films deteriorates. This intensity degradation might be due to the irradiation-induced defects created in the sample 23,24 .…”

Section: Structural Properties Of Tips Pentacene Thin Filmmentioning

confidence: 99%

Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

et al. 2022

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“…VELF values are higher than SELF values, indicating that electron excitation in the material is more likely than through the material surface. 62 The strong interaction between nanofillers and the polymers matrix results in an increase in the number of defects, as evidenced by the higher values of both the SELF and VELF functions as the amount of NiO and/or Co 3 O 4 fillers is varied.…”

Section: Uv-spectroscopy Investigationsmentioning

confidence: 99%

PVC polymer/ZnO/NiO/Co₃O₄ nanocomposites: Toward improved optical properties

El‐Naggar

Kamal

Abd‐Elkader

et al. 2023

Vinyl Additive Technology

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Undoped and doped polyvinyl chloride (PVC) with zinc, nickel and cobalt oxides, ZnO/[(1−x)NiO/xCo3O4], composites were fabricated using co‐precipitation and casting techniques. The different phases present in the nanofiller ZnO/[(1−x)NiO‐xCo3O4] mixed oxides were determined using synchrotron x‐ray diffraction technique. X‐ray diffraction, scanning electron microscopy (SEM) images and energy dispersive spectroscopy (EDS) analysis techniques were used to investigate the structure, composition, and morphology of pure and loaded PVC with nanofiller oxides. In general, compared with pure PVC, the absorbance was greatly enhanced, especially in the UV region, upon loading ZnO/[(1−x)NiO‐xCo3O4], but it changed irregularly with the cobalt oxide (Co3O4) content (x). The direct and indirect optical band gaps of pristine PVC (4.14, 4.12 eV) reduced irregularly to minimum values 3.97 and 3.23 eV respectively for the polymer doped with ZnO/[0.3NiO/0.7Co3O4]. The refractive index was enhanced in the visible and IR regions and attained its highest value for PVC doped with zinc oxide/nickel oxide (ZnO/NiO) only (x = 0.0). NiO and Co3O4 ratios affect the linear and nonlinear optical parameters. The emitted spectra from pure and doped PVC polymers with the composite oxides [ZnO/[(1−x)NiO‐xCo3O4] under different excitation wavelengths were also explored. The FL intensity enhanced for the excitation wavelengths (λexc) = 380 and 434 nm but quenched for λexc = 317 nm. The loaded polymers absorb UVA, UVB, and UVC rays and are good candidates for solar cell applications.

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“…It is interesting to know that electrons lose energy as they speed through a material because plasma oscillations in the conduction sea are excited [73]. The functions of volume energy loss (VELF) and surface energy loss (SELF) define the probability that fast electrons will undergo energy loss during their travels within and on the surface of the material, respectively [74]. Real (ε r ) and the imaginary (ε i ) parts of the dielectric constant were utilized to Table 3.…”

Section: Energy Loss Functionmentioning

confidence: 99%

Influence of Fe₂O₃@reduced graphene oxide nanocomposite on the structural, morphological, and optical features of the polyvinyl alcohol films for optoelectronic applications

et al. 2023

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Polyvinyl alcohol (PVA) films doped with Fe2O3-reduced graphene oxide (rGO) nanoparticles (NPs) were prepared using a casting-method. Fe2O3 NPs were synthesized via the hydrothermal process, and then Fe O2 3 NPs were decorated on the graphene oxide (GO) sheets, where the GO was transferred to rGO during the sonication process. The obtained films were characterized using XRD and FTIR techniques. Optical absorption and transmission data were recorded via a UV-visible spectrophotometer and used to estimate various optical parameters. Increasing the amount of doped Fe2O3-rGO NPs in PVA decreased the ability of the prepared nanocomposites to allow visible light to pass through them. Solar material protection factor (SMPF) of PVA (11.93%) improved to 99.3%, corresponding to 2 wt.% of Fe2O3-rGO NPs doped in the host matrix. The calculated values of the average refractive index are 2.18, 2.25, 2.36, 2.46, and 2.58, corresponding to 0 wt.%, 0.5 wt.%, 1 wt.%, 1.5 wt.%, and 2 wt.% of Fe2O3-rGO NPs doped in PVA. Therefore, the average refractive index showed a dependence on Fe2O3-rGO NPs. Low energy region (E < 2.4 eV) showed dielectric relaxation time- energy dependent behavior, whereas the high energy region (E > 2.4 eV) displayed dielectric relaxation time- energy independent behavior. Increasing the content of the doped NPs in PVA resulted in lowering the surface and volume energy loss.

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Gamma radiation-induced changes on the structural and optical properties of aluminum phthalocyanine chloride thin films

Cited by 15 publications

References 34 publications

Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

PVC polymer/ZnO/NiO/Co₃O₄ nanocomposites: Toward improved optical properties

Influence of Fe₂O₃@reduced graphene oxide nanocomposite on the structural, morphological, and optical features of the polyvinyl alcohol films for optoelectronic applications

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Gamma radiation-induced changes on the structural and optical properties of aluminum phthalocyanine chloride thin films

Cited by 15 publications

References 34 publications

Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

Structural and Optical Properties of TIPS Pentacene Thin Film Exposed to Gamma Radiation

PVC polymer/ZnO/NiO/Co3O4 nanocomposites: Toward improved optical properties

Influence of Fe2O3@reduced graphene oxide nanocomposite on the structural, morphological, and optical features of the polyvinyl alcohol films for optoelectronic applications

Contact Info

Product

Resources

About

PVC polymer/ZnO/NiO/Co₃O₄ nanocomposites: Toward improved optical properties

Influence of Fe₂O₃@reduced graphene oxide nanocomposite on the structural, morphological, and optical features of the polyvinyl alcohol films for optoelectronic applications