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Journal ArticleDOI

Investigation into the Structural and Electrical Properties of Silver-Intercalated Zirconium Diselenide

01 Nov 2003-Physics of the Solid State (Nauka/Interperiodica)-Vol. 45, Iss: 11, pp 2067-2071

AbstractSilver-intercalated zirconium diselenides of the general formula AgxZrSe2 are synthesized for the first time. The phase diagram of the AgxZrSe2 compound is determined in the temperature range 423–523 K and at room temperature. An analysis has revealed the coexistence of two compounds, namely, Ag0.125ZrSe2 and Ag0.25ZrSe2, of which only the latter compound is stable at room temperature. The structural and electrical properties of AgxZrSe2 diselenides are investigated. The results obtained indicate a polaron nature of charge-carrier localization. A comparison with isostructural intercalation compounds shows that free charge carriers play a dominant role in screening of the impurity potential.

Topics: Zirconium (57%), Diselenide (56%), Isostructural (53%), Atmospheric temperature range (53%), Phase diagram (52%)

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Journal ArticleDOI
Abstract: The electrical properties of intercalated Ag x HfSe2 compounds (x = 0.1, 0.2) have been investigated for the first time. Investigations have been performed using various current electrodes, which make it possible to pass either the electron current or the ion current across the sample. Polarization effects, which indicate the self-consistent migration of charge carriers in the samples, have been found for the samples at room temperature. Based on the characteristic features of polarization decay, coefficients of conjugated chemical diffusion have been evaluated.

5 citations


Journal ArticleDOI
01 Feb 2020
Abstract: This research focus on the Influence of Dopant Concentration on Polycrystalline Ytterbium-doped ZrSe (Yb-ZrSe) material for possible photovoltaic application using the electrochemical deposition method. The cationic precursor was an aqueous solution of 0.01 mol ZrOCl2.8H2O while the anionic precursor was 0.15 mol selenium was prepared by dissolving with 5 ml of Hydrochloric acid (HCl), and then 0.05 mol Yb (NO3)3.5H2O was used as the dopant. The films were characterized using UV-1800 Visible Spectrophotometer, Bruker D8 Advance x-ray diffractometer with Cu Kα line (λ = 1.54056 A) in 2θ range from 10°–90°and Scanning Electron Microscopy. X-ray diffraction (XRD) of the deposited films on FTO substrate studies reveals that films are polycrystalline by exhibiting diffraction peaks at (111), (200), (200) and (210) corresponds to the following angle (27.00°), (38.01°), (46.02°), (66.02°). (SEM) revealed that the grain size was uniformly distributed on the surface of the substrate. The optical band gap energy was obtained.

4 citations


Journal ArticleDOI
Abstract: The specific features of the charge transfer in intercalated samples of AgxHfSe2 have been studied for the first time by alternating current (ac) impedance spectroscopy. It has been found that relaxation pro� cesses in an ac field are accelerated with increasing silver content in the samples. The complex conductivity (Y) shows a frequency dispersion described by power law Y ~ ω s , which is characteristic of the hopping con� ductivity mechanism. The Agx HfSe 2 compounds demonstrate shorter relaxation times as compared to those observed in hafnium diselenide intercalated with copper atoms, and this fact indicates that the charge carrier mobility in the silverintercalated compounds is hi gher. The possibility of silver ion transfer in AgxHfSe2 is confirmed by the measurements performed by the method of electrochemical cell emf.

4 citations


Journal ArticleDOI
24 Jun 2020
TL;DR: The synthesis and characterization of Fe-intercalated ZrSe2 thin films on quartz substrates are demonstrated using the low-pressure chemical vapor deposition of the single-source precursor [Fe(η5-C5H4Se)2Zr(ε5- C5H5)2]2.
Abstract: Transition metal chalcogenide thin films of the type FexZrSe2 have applications in electronic devices, but their use is limited by current synthetic techniques Here, we demonstrate the synthesis a

3 citations


References
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77 citations


Journal ArticleDOI
M. Koyano1, H. Negishi1, Yoshifumi Ueda1, Minoru Sasaki1, Masasi Inoue1 
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40 citations


Journal ArticleDOI
Abstract: We present a set of experimental data on the Li x ZrSe 2 system as a function of x, including X ray, electrochemical, conductivity, NMR and EPR measurements. All experiments confirm the occurence of a non-metal to metal transition as a function of concentration at about x = 0.4 as previously suggested from 77 Se NMR results. At the transition lattice parameters change abruptly within the same symmetry group. In the concentration range 0 7 Li and 77 Se NMR as well as EPR results show the absence of a large concentration of electronic magnetic moments. This suggest that the electrons given up by the Li are localized as diamagnetic pairs or clusters up to the percolation limit.

34 citations