Transport phenomena of Cu–S–Te chalcogenide nanocomposites: frequency response and AC conductivity

Ojha, Swarupa; Roy, Malabika; Chamuah, Anil; Bhattacharya, Koyel; Bhattacharya, Sanjib

doi:10.1039/d0cp04076b

Cited by 37 publications

(13 citation statements)

References 47 publications

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“…Some focus on the intrinsic properties of the materials, while others highlight applications such as photovoltaic cells, light-emitting diodes, and transparent transistors. Compared to these large families of materials, chalcogen-based wide-band-gap semiconductors (Ch = S, Se, Te) ( E g > 2 eV) are characterized by their propensity for p-type doping, high mobility, high valence-band positions, and lower ionization energies. − However, compared to M–O bonds, the weaker M–Ch (with Ch = S, Se, Te) bonds in these materials may lead to increased degradation and stability concerns in chalcogenides …”

Section: Introductionmentioning

confidence: 99%

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

et al. 2021

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In this study, we investigated the potential of palladium tetrakis (imidazole) phthalocyanine (PdPc(Imz) 4 ) for use as an organic semiconductor for improving the photovoltaic performance. In order to get more information about the prevailing model of the conduction mechanism (correlated barrier hopping (CBH)) for PdPc(Imz) 4 , electrical impedance measurements were performed at different temperatures and the obtained data were simulated by the Kohlraush Williams Watt (KWW) approach. Theoretical studies (density functional theory (DFT)) were performed and molecular electrostatic potential (MEP) maps were also extracted to understand the relationship between the molecular structures and the molecular electronic structure of PdPc(Imz) 4 and its semiconductor properties. Furthermore, studies on the AC electrical process as a function of temperature highlighted a hopping charge transport according to an equivalent electrical circuit composed of a parallel constant-phase element (CPE), capacitance in the grain boundary layer ( C g ), and resistance of the grain boundary ( R g ). To improve interpretation of the results, an in-depth analysis of the behavior of the electric transport was conducted. As a result, the correlated barrier hopping (CBH) conduction mechanism was shown to be the most suitable predominant conduction mechanism.

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Section: Introductionmentioning

confidence: 99%

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

et al. 2021

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“…This experiment demonstrates that the hopping process is the only factor that affects conductivity [60] . Higher values of n would suggest the motion of a small polaron in the current nano glassy system is percolation type [60–62,23–24,37] …”

Section: Resultsmentioning

confidence: 69%

“…[60] Higher values of n would suggest the motion of a small polaron in the current nano glassy system is percolation type. [60][61][62][23][24]37] We have observed that DC activation energy (E σ ), and activation energy (E H ) for hopping frequency (ω H ) increases with increasing Fe content in glass system based on xFe ⋅ (1-x) (0.3 V 2 O 5 ⋅ 0.2MoO 3 ⋅ 0.4CdO ⋅ 0.1ZnO) [x = 0.0, 0.05, 0.10] compare with other glassy systems [12,[23][24][53][54]56] (Table 1).…”

Section: Ac Conductivitymentioning

confidence: 99%

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite

et al. 2023

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The effect of varying iron content on the crystallization behavior and electrical conductivity mechanism of glass nanocomposite based on the system xFe ⋅ (1‐x) ⋅ (0.3 V2O5 ⋅ 0.2MoO3 ⋅ 0.4CdO ⋅ 0.1ZnO) (x=0.0, 0.05 and 0.1) was investigated by differential scanning calorimetry (DSC), Fourier transforms infrared (FTIR), X‐ray diffraction (XRD), and field emission‐scanning electron microscopy (FESEM). Different crystal phases and the average size of the developed nanocrystallites in the as‐prepared samples have been obtained from the XRD diffraction data. The size of estimated nanocrystallites increases up to Fe (x) content 0.05, after which the size of nanocrystallites decreases as the Fe content in the compositions increases. FESEM micrographs confirm the formation of plate‐like and dendrite nano crystallites throughout the glass matrix. Energy‐dispersive X‐ray spectroscopy (EDX) mapping analysis shows the weight percentage of each constituent element. The dc activation energy (Eσ), as well as activation energy (EH) for hopping frequency of as‐prepared samples, gradually decreases with increasing Fe content whereas AC and DC conductivity gradually increased.

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“…The dielectric properties can be analyzed via complex electric modulus formalism M* (ω) which permits to study charge transport processes. [37,38] It is defined as the inverse of complex permittivity process ε Ã ðωÞ admitted as [39,40]…”

Section: The Electrical Modulus Formalismmentioning

confidence: 99%

Experimental Investigation on Electric and Dielectric Properties of Thallium Ions Doped Sodium Zinc Phosphate Glass

Belahcene,

Kharroubi,

Bourezg

et al. 2023

Physica Status Solidi (b)

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Sodium zinc phosphate glasses modified by Tl2O addition of composition Na2−xTlxZnP2O7 (x = 0, 0.005, 0.01, and 0.015) are synthesized following the melt quenching technique. The structure of the glass samples is analyzed by the Fourier transform infrared absorption spectroscopy. The results suggest that the phosphate network is polymerized by the addition of Tl+ ions. The electrical conductivity, electric modulus, and dielectric constant characteristics of the glasses are measured over a wide continuous frequency range of 10−2 Hz–1 MHz and in the temperature range 293–473 K by the impedance spectroscopic method. The ac conductivity data are analyzed following the power law exponent (S) and the proposed correlated barrier hopping mechanism (CBH) is the most suitable conduction mechanism in the studied compositions. The electrical modulus formalism is applied to analyze the electric data to study their dielectric relaxation. Non‐Debye type relaxation is obtained. From the obtained results, the present glass can be used as a high‐energy capacitor.

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Transport phenomena of Cu–S–Te chalcogenide nanocomposites: frequency response and AC conductivity

Abstract: In this communication, development and electrical characterization of some chalcogenide nanocomposites have been reported. X-ray diffraction (XRD) has been studied to reveal microstructure of them. Mott’s variation range hopping model...

Cited by 37 publications

References 47 publications

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite

Experimental Investigation on Electric and Dielectric Properties of Thallium Ions Doped Sodium Zinc Phosphate Glass

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Transport phenomena of Cu–S–Te chalcogenide nanocomposites: frequency response and AC conductivity

Abstract: In this communication, development and electrical characterization of some chalcogenide nanocomposites have been reported. X-ray diffraction (XRD) has been studied to reveal microstructure of them. Mott’s variation range hopping model...

Cited by 37 publications

References 47 publications

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

Impedance Spectroscopy and Dielectric Relaxation of Imidazole-Substituted Palladium(II) Phthalocyanine (ImPdPc) for Organic Solar Cells

Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V2O5 ⋅ MoO3 ⋅ CdO ⋅ ZnO Glass Nanocomposite

Experimental Investigation on Electric and Dielectric Properties of Thallium Ions Doped Sodium Zinc Phosphate Glass

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Influence of Fe on Crystallization Behaviour and Electrical Conductivity of V₂O₅ ⋅ MoO₃ ⋅ CdO ⋅ ZnO Glass Nanocomposite