scholarly journals Electrical properties of cation-substituted Ag7(Si1–xGex)S5I single crystals

2021 ◽  
Vol 24 (3) ◽  
pp. 241-247
Author(s):  
I.P. Studenyak ◽  
◽  
A.I. Pogodin ◽  
I.A. Shender ◽  
M.J. Filep ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Single Crystals ◽  
Solid Solutions ◽  
Frequency Range ◽  
Electronic Components ◽  
High Quality ◽  
Crystallization Method ◽  
Vertical Zone ◽  
Nyquist Plots

High-quality single crystals of Ag7(Si1–xGex)S5I (x = 0.2, 0.4, 0.6, 0.8) solid solutions are grown from the solution–melt by vertical zone crystallization method. The measurements of electrical conductivity of Ag7(Si1–xGex)S5I solid solutions were performed using the impedance spectroscopy method within the frequency range from 10 Hz up to 2·106 Hz and temperature interval 293–383 K. Ionic and electronic components of electrical conductivity, as well as their ratios, were determined using the Nyquist plots.

scholarly journals Electrical Conductivity Studies of Composites Based on (Cu1–xAgx)7GeSe5I Solid Solutions

2020 ◽  
Vol 65 (1) ◽  
pp. 55
Author(s):  
A. I. Pogodin ◽  
M. M. Luchynets ◽  
V. I. Studenyak ◽  
O. P. Kokhan ◽  
I. P. Studenyak ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Impedance Spectroscopy ◽  
Solid Solutions ◽  
Frequency Range ◽  
Total Electrical Conductivity ◽  
Cationic Substitution ◽  
Nyquist Plots ◽  
Ionic Components ◽  
Frequency Dependences

Polymer composites based on (Cu1−xAgx)7GeSe5I solid solutions are produced. The electrical conductivity of the composites is measured by impedance spectroscopy in the frequency range from 20 Hz to 2×106 Hz and in the temperature interval 292–338 K. The frequency dependences of the total electrical conductivity are obtained, the Nyquist plots are constructed, and their analysis is performed. The effect of Cu+ →Ag+ cationic substitution on the total electrical conductivity and the activation energy, as well as on the electronic and ionic components of the electrical conductivity of composites based on (Cu1−xAgx)7GeSe5I solid solutions is studied on the basis of compositional dependences.

scholarly journals Influence of Cation Substitution on Ionic and Electronic Conductivity of (Cu1 – xAgx)7GeS5I Mixed Crystals

2021 ◽  
Vol 66 (4) ◽  
pp. 341
Author(s):  
A.I. Pogodin ◽  
V.I. Studenyak ◽  
M.Y. Filep ◽  
O.P. Kokhan ◽  
I.P. Studenyak ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electronic Conductivity ◽  
Mixed Crystals ◽  
Cation Substitution ◽  
Frequency Range ◽  
Electronic Components ◽  
Impedance Measurements ◽  
Electronic Conductivities ◽  
Nyquist Plots ◽  
Frequency Dependences

Impedance measurements of (Cu1−xAgx)7GeS5I mixed crystals are carried out in the frequency range from 10 Hz to 300 kHz and in the temperature interval 292–383 K. The temperature and frequency dependences of the electrical conductivity for (Cu1−xAgx)7GeS5I mixed crystals are studied. Based on the analysis of Nyquist plots and using the electrode equivalent circuits, the values of ionic and electronic components of the electrical conductivity are determined. The compositional behavior of the ionic and electronic conductivities, as well as the compositional behavior of their activation energies, are discussed. The ratio of ionic and electronic components of the conductivity for (Cu1−xAgx)7GeS5I mixed crystals was analyzed.

scholarly journals Crystal structure and electrical properties of Ag6PS5I single crystal

2021 ◽  
Vol 24 (1) ◽  
pp. 26-33
Author(s):  
I.P. Studenyak ◽  
◽  
A.I. Pogodin ◽  
M.J. Filep ◽  
O.P. Kokhan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electrical Conductivity ◽  
Single Crystal ◽  
Rietveld Method ◽  
Chemical Deposition ◽  
Ion Diffusion ◽  
Crystallization Method ◽  
Vertical Zone ◽  
Impedance Spectroscopy Technique ◽  
Nyquist Plots

The single crystals of quaternary halogen Ag6PS5I were grown from the solution–melt by means of a vertical zone crystallization method. The crystal structure has been ascertained using the Rietveld method. Investigation of electrical conductivity was carried out using the impedance spectroscopy technique within the frequency range 1·101 – 3·105 Hz and temperature interval 293–383 K on gold contacts applied by chemical deposition from solution. Ionic (1.79·10-3 S/cm) and electronic (1.64·10-6 S/cm) components of electrical conductivity have been determined using the Nyquist plots. The mechanism of ionic conductivity for Ag6PS5I single crystal has been proposed which can be considered as ion diffusion through “channels” Ag2–Ag2.

scholarly journals Preparation and electrical conductivity of (Cu0.5Ag0.5)7SiS5I-based superionic ceramics

2020 ◽  
Author(s):  
Ihor Studenyak ◽  
Artem POGODIN ◽  
Iryna SHENDER ◽  
Serhiy BEREZNYUK ◽  
Mykhailo FILEP ◽  
...  
Keyword(s):  
Solid Solution ◽  
Electrical Conductivity ◽  
Electronic Conductivity ◽  
Microstructural Analysis ◽  
Structural Studies ◽  
Frequency Range ◽  
Electronic Components ◽  
Total Electrical Conductivity ◽  
Ceramic Samples ◽  
Average Size

Abstract The ceramics based on (Cu0.5Ag0.5)7SiS5I solid solution of superionic conductor with argyrodite structure were prepared by using the powders with different particles size. The structural studies of powders were performed by XRD technique, while the ceramic samples with different average size of the crystallites were investigated by microstructural analysis. The total electrical conductivity of ceramic samples was measured by impedance spectroscopy in the frequency range from 10 Hz to 2×106 Hz and temperature interval from 292 K to 383 K. The contributions of ionic and electronic components into the total electrical conductivity were separated as well as their temperature behavior was studied. The dependences of ionic and electronic conductivity and their activation energies on average size of the crystallites in (Cu0.5Ag0.5)7SiS5I-based ceramic samples were investigated.

Seed crystal free growth of high-quality double cation – double halide perovskite single crystals for optoelectronic applications

2020 ◽  
Vol 8 (24) ◽  
pp. 8275-8283
Author(s):  
Julian Höcker ◽  
Mehmet Ozcan ◽  
Sebastian Hammer ◽  
Mathias Fischer ◽  
Benedikt Bichler ◽  
...  
Keyword(s):  
Single Crystals ◽  
Seed Crystal ◽  
High Quality ◽  
Crystallization Method ◽  
Halide Perovskite ◽  
Free Growth ◽  
Optoelectronic Applications

We developed a seed crystal free re-fill crystallization method (RFCM) to grow high-quality (FAPbI3)0.9(MAPbBr3)0.1 perovskite single crystals for optoelectronic applications.

scholarly journals Dependence of Electrical Properties on Frequency and Temperature for Novel Cyclopentenone Derivatives

2020 ◽  
Vol 1 (1) ◽  
pp. 13-25
Author(s):  
Salama A. H.
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Electrical Properties ◽  
Arrhenius Equation ◽  
Charge Carriers ◽  
Frequency Range ◽  
Ac Electrical Conductivity ◽  
Dc Electrical Conductivity ◽  
Arrhenius Relation

Electrical properties of some new cyclopentenone derivatives have been studied. The structures of prepared samples were characterized by (UV), (XRD) and (SEM). The dependence of electrical properties such as σdc , σac , ɛ' and ɛ'' on frequency and temperature were studied at frequency range from 50 Hz to 5 MHz and the temperature range from 25oC to 140oC. It was found that, ɛ' decreased with increasing frequency while it increases with increasing temperatures within the used ranges. Moreover, dielectric constant is structural dependent which is obvious from the variation of dielectric constant for each sample. Ac-electrical conductivity increased with increasing frequency which was attributed to the polarization of the charge carriers. The temperature dependence of dc-electrical conductivity show typical Arrhenius relation for the three prepared samples. The activation energy calculated from Arrhenius equation and the results are discussed in detailed.

Inter-cluster distance dependence of electrical properties in single crystals of a mixed-valence polyoxometalate

2017 ◽  
Vol 46 (37) ◽  
pp. 12619-12624 ◽  
Author(s):  
Ryo Tsunashima ◽  
Ippei Nakamura ◽  
Rika Oue ◽  
Seiya Koga ◽  
Hirofumi Oki ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Single Crystals ◽  
Mixed Valence ◽  
Distance Dependence ◽  
Cluster Distance

Electrical conductivity of [MoV2MoVI16O54(SO3)2]6− was investigated through dependence on the inter-cluster distance controlled by tetraethylammonium, tetrapropylammonium, and tetrabutylammonium cations.

Notizen: Electrical Conduction in Thioxanthene

1976 ◽  
Vol 31 (9) ◽  
pp. 1301-1302
Author(s):  
S. Pietra ◽  
A. Tenaglia
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Single Crystals ◽  
Electrical Conduction

Electrical conductivity of thioxanthene single crystals has been observed. The electrons, injected from the electrodes or freed by sulphur atoms, are responsible for the electrical properties. The activation energy for the conduction is higher than in thianthrene, it depends maybe on the number of S atoms in the molecule.

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