Thermoluminescence Characteristics of Natural Quartz and Synthesized Silica Glass Prepared by Sol-Gel Technique

Khamis, F.; Arafah, D.-E.

doi:10.9734/ajopacs/2017/35542

Cited by 8 publications

(15 citation statements)

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“…All materials show the same broad band at 2 θ close to 23–26°, which is related to the amorphous silica of the SBA-15 walls. 83 Non-impregnated SBA-15 presented no peaks along the analysis, evidencing that no residual metal species were present.…”

Section: Resultsmentioning

confidence: 94%

SBA-15 obtained from rice husk ashes wet-impregnated with metals (Al, Co, Ni) as efficient catalysts for 1,4-dihydropyridine three-component reaction

et al. 2022

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Section: Resultsmentioning

confidence: 94%

SBA-15 obtained from rice husk ashes wet-impregnated with metals (Al, Co, Ni) as efficient catalysts for 1,4-dihydropyridine three-component reaction

et al. 2022

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“…A broad band peaking at 23°can be seen in this pattern, which could also be seen as a small band in the same position after the CuI film was deposited. This peak is wellknown to be of amorphous glass, 33 but due to its sharpness at 23°, its appearance is still clear in the patterns of those of CuI thin films (Figure 1a). The films postannealed at 373, 473, and 573 K show similar patterns, but with a systematic decrease in the intensity of the XRD peaks.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

“…These diffraction peaks can be assigned to (111), (220), and (311) planes, respectively . One small peak can be observed at around 23°, which might be of the glass substrate, typically of the amorphous phase of SiO 2 . The XRD pattern of the glass slide used as a substrate to deposit CuI thin films by the PLD technique was also recorded, and the obtained result is shown in the inset of Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…32 One small peak can be observed at around 23°, which might be of the glass substrate, typically of the amorphous phase of SiO 2 . 33 The XRD pattern of the glass slide used as a substrate to deposit CuI thin films by the PLD technique was also recorded, and the obtained result is shown in the inset of Figure 1a. A broad band peaking at 23°can be seen in this pattern, which could also be seen as a small band in the same position after the CuI film was deposited.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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CuI: A Promising Halide for Thermoelectric Applications below 373 K

Almasoudi

Saeed

Salah

et al. 2022

ACS Appl. Energy Mater.

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Highly transparent p-type γ-CuI thin films with enhanced thermoelectric (TE) properties were produced by the pulsed laser deposition (PLD) technique. The film composed of fine nanoparticles was found to show transparency close to 90% and excellent TE performance at 300–360 K. Postannealing at three different temperatures in the range of 373–573 K in a vacuum was found to diminish the deviation from the stoichiometric composition, namely, δ in Cu1−δI, possibly due to iodine evaporation. The carrier (hole) concentration decreased and the Hall mobility increased on increasing the postannealing temperature, i.e., by decreasing δ. The film postannealed at 373 K showed the best TE performance with a high electrical conductivity of ∼14 000 S/m, a large Seebeck coefficient of ∼350 μV/K, and a high power factor of ∼1600 μW/(m K2) at 300 K. The degeneracy of the heavy- and light-hole bands of γ-CuI could enhance the Seebeck coefficient through enhancing the effective mass of holes and decreasing the carrier concentration, while electrical conductivity was only slightly decreased. Thermal conductivity of the γ-CuI thin films was verified to be as low as 0.77–0.83 W/(m K) at 300 K. The present study firmly demonstrates the high potential of the γ-CuI thin film as a p-type TE material to be paired with an n-type material for flexible TE devices and self-powered electronic systems operating at 300–360 K.

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“…A full width at half-maximum (fwhm) of 0.1° is sufficient to indicate a good performance of crystallinity, and the sample synthesized in this work had an fwhm of 0.06°, thereby indicating an excellent quality of crystals. Also, no other peaks associated with MACl and PbCl 2 can be found, but there was a weak peak at an angle of 21.5° due to the silicon substrate used for testing . The single-crystal facet was carefully polished with abrasive paper to reduce the polycrystalline surface.…”

Section: Experimental and Computational Methodologymentioning

confidence: 99%

Effect of Structural Morphology and Material Factors on Radiative Properties of Hybrid Perovskite/Nanoporous GaN Hierarchical Composite Structure

Cheng

Zhao

et al. 2022

ACS Appl. Opt. Mater.

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The encapsulation of hybrid perovskite in nanoporous GaN is a promising strategy to reduce perovskite degradation and improve photoelectric performance. Exploitation of the intrinsic light-matter interaction in such a composite structure greatly benefits improving device optimization. Herein, we report the perovskite synthesis, structural design, and radiative properties of perovskite/nanoporous GaN hierarchical composites using spectroscopic ellipsometry (SE) experiments as well as electromagnetic simulations. Firstprinciples calculations reveal the relationship between electronic interband transitions and the dielectric function of perovskite measured by SE. We use the finite-difference time-domain (FDTD) and finite-element method (FEM) simulations to analyze the spectral radiation properties for the hierarchical composite structure in terms of both morphology dependence and material factors. The optical absorption peaks in the near-infrared−visible region are collectively determined by the nanopore size, layer thickness, and incident angle of light. Also, the optical absorption distribution patterns are related to variables of the halogen, metal elements, and temperature. This work is integrated with the development of perovskite-based applications for solar functional batteries, light-emitting diodes (LED), and optoelectronic detectors.

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Thermoluminescence Characteristics of Natural Quartz and Synthesized Silica Glass Prepared by Sol-Gel Technique

Cited by 8 publications

References 0 publications

SBA-15 obtained from rice husk ashes wet-impregnated with metals (Al, Co, Ni) as efficient catalysts for 1,4-dihydropyridine three-component reaction

SBA-15 obtained from rice husk ashes wet-impregnated with metals (Al, Co, Ni) as efficient catalysts for 1,4-dihydropyridine three-component reaction

CuI: A Promising Halide for Thermoelectric Applications below 373 K

Effect of Structural Morphology and Material Factors on Radiative Properties of Hybrid Perovskite/Nanoporous GaN Hierarchical Composite Structure

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