Role of indium doping on structural and electrical properties of ZnO nanoparticles prepared by sol–gel method

Mourad, Sabrine; Ghoul, J. El; Khirouni, K.

doi:10.1007/s10854-020-03193-1

Cited by 10 publications

(4 citation statements)

References 57 publications

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“…Moreover, it is seen that the conductivity value increases as the temperature increases, which is the result of a typical semiconductor behavior. It also shows that conductivity can be activated thermally and that charge carriers have long-distance mobility [53]. The temperature-dependent graph of AC conductivity characteristics at various frequencies for the ZnO/Si diode is shown in figure 5(b).…”

Section: Resultsmentioning

confidence: 97%

Temperature-dependent dielectric properties of p-n heterojunction diodes based on hydrothermally synthesized ZnO nanostructures

Çağırtekin,

Ajjaq,

Barin

et al. 2023

Phys. Scr.

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In this study, the effect of coating p-Si substrates with a pure ZnO layer using the hydrothermal reaction method on the dielectric parameters was reported. The studied dielectric properties of the ZnO/p-Si structure include dielectric constant (ε′), dielectric loss (ε″), ac electrical conductivity (σ AC), and real and imaginary electrical modulus (M′, M″). These properties were investigated using experimental capacitance-frequency (C-f) and conductivity-frequency (G-f) measurements in a frequency range of 20 Hz-1 MHz and a temperature range of 300-420 K. Experimental results show that dielectric parameters are strongly frequency- and temperature-dependent. The dielectric constant showed an increase of about 11 times in the investigated temperature range. At the same time, AC electrical conductivity increased with increasing frequency and temperature. In addition, the electrical modulus was examined, and peaks were observed in M″ values. It was observed that the peaks shifted to the high-frequency region with the increase in temperature. The activation energies were also calculated from the conductivity parameters and a decrease was observed in the activation energies as the frequency increased. Regardless of temperature and frequency, the higher dielectric loss of the fabricated diode compared to its dielectric constant can be advantageous for certain heating or electromagnetic absorption applications.

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Section: Resultsmentioning

confidence: 97%

Temperature-dependent dielectric properties of p-n heterojunction diodes based on hydrothermally synthesized ZnO nanostructures

Çağırtekin,

Ajjaq,

Barin

et al. 2023

Phys. Scr.

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“…Conductivity values generally increased linearly with increasing frequency for two samples. The increase in conductivity with increasing frequency and the presence of a frequency dependent region indicate the existence of a hopping mechanism …”

Section: Resultsmentioning

confidence: 99%

“…frequency and the presence of a frequency dependent region indicate the existence of a hopping mechanism. 43 The dc conductivity (σ dc ) for DPP-Et-Kum-Et and DPP-Kum-Et was calculated based on ac measurements at low frequencies (200 Hz), and the variation of these values with measurement temperature (1000/T) is plotted in Figures 12 and 13. Conductivity values increasing with temperature indicate that the carriers are thermally activated.…”

Section: Fluorescence Emission and Fluorescencementioning

confidence: 99%

Coumarin–Phosphazenes: Enhanced Photophysical Properties from Hybrid Materials

Şahin,

Biryan,

Çalışkan

et al. 2024

Inorg. Chem.

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Phosphazenes have drawn a great deal of interest over the past 20 years as a potentially useful building block for the fabrication of fluorescent materials. The main objective of this work is to explore novel derivatives produced by coumarins, a class of chemicals well-known for their photophysical importance, and cyclophosphazenes. UV absorbance, fluorescence emission, quantum yield, and lifetime measurements were conducted to comprehend the optical properties. Furthermore, single-crystal X-ray analysis and theoretical calculations were carried out to confirm the structure of the molecule. The obtained findings collectively confirm the commendable optical properties exhibited by the studied compounds. Moreover, a detailed study of the crystal packing arrangement of DPP-Et-Kum-Et compound crystallized in the P21/n monoclinic space group revealed the presence of stacking interactions between the nonplanar conjugated benzene rings of the coumarins and the rigid diphenyl groups attached to the phosphazene ring. The crystal structure of the DPP-Kum-Me-Me compound is mainly based on classical C–H···O intermolecular hydrogen bonding interactions with an average distance of 2.52 Å. Importantly, the calculated absorption spectra of the compounds are in close agreement with the experimental data, further supporting their interesting electronic properties. Given that the DPP-Et-Kum-Et and DPP-Kum-Et compounds have the theoretically lowest band gaps (4.31 and 4.30 eV, respectively), the activation energies of these compounds were determined by an impedance analyzer using dc conductance values measured at different temperatures. The calculated activation energies for DPP-Et-Kum-Et and DPP-Kum-Et are 104.49 and 100.92 meV, respectively. The results demonstrate that both theoretical and experimental calculations are in agreement with each other and that the DPP-Kum-Et compound has the lowest conductivity.

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“…Additionally, Mourad et al reported the formation of un-doped ZnO and In-doped ZnO nanoparticles via sol-gel technique from 0 to 5 wt% of in values. Their morphological results indicated that the crystallite shapes were hexagonal and turned into cylindrical prismatic after doping [33]. In the case of the nanoparticles, it is known that the range and morphology of nanoparticles can be changed by changing the synthesis method and stoichiometric parameters.…”

Section: Introductionmentioning

confidence: 99%

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

et al. 2021

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Zinc oxide nanoparticles (ZnO) exhibit numerous characteristics such as biocompatibility, UV protection, antibacterial activity, high thermal conductivity, binding energy, and high refractive index that make them ideal candidates to be applied in a variety of products like solar cells, rubber, cosmetics, as well as medical and pharmaceutical products. Different strategies for ZnO nanoparticles’ preparation have been applied: sol-gel method, co-precipitation method, etc. The sol-gel method is an economic and efficient chemical technique for nanoparticle (NPs) generation that has the ability to adjust the structural and optical features of the NPs. Nanostructures are generated from an aqueous solution including metallic precursors, chemicals for modifying pH using either a gel or a sol as a yield. Among the various approaches, the sol-gel technique was revealed to be one of the desirable techniques for the synthesis of ZnO nanoparticles. In this review, we explain some novel investigations about the synthesis of zinc oxide nanoparticles via sol-gel technique and applications of sol-gel zinc oxide nanoparticles. Furthermore, we study recent sol-gel ZnO nanoparticles, their significant characteristics, and their applications in biomedical applications, antimicrobial packaging, drug delivery, semiconductors, biosensors, catalysts, photoelectron devices, and textiles.

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Role of indium doping on structural and electrical properties of ZnO nanoparticles prepared by sol–gel method

Cited by 10 publications

References 57 publications

Temperature-dependent dielectric properties of p-n heterojunction diodes based on hydrothermally synthesized ZnO nanostructures

Temperature-dependent dielectric properties of p-n heterojunction diodes based on hydrothermally synthesized ZnO nanostructures

Coumarin–Phosphazenes: Enhanced Photophysical Properties from Hybrid Materials

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications

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