Article (Scientific journals)
Dielectric relaxation and charge transfer mechanism of the inorganic perovskite CsHgCl3
Gharbi, Imen; Ghoudi, Arafet; Kammoun, Imed et al.
2024In Inorganic Chemistry Communications, 166, p. 112565
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Keywords :
And Polarization; Dielectric properties; Electrical conduction mechanism; PXRD; “ac” conductivity; Physical and Theoretical Chemistry; Inorganic Chemistry; Materials Chemistry
Abstract :
[en] Inorganic perovskite provides promising opportunities for use in optoelectronics due to its wide range of physical characteristics and structural configuration. In this paper, the CsHgCl3 compound was successfully synthesized via the slow evaporation method at room temperature. The X-ray diffraction pattern indicated a cubic structure in the Pm3¯m group space. Also, an extensive investigation was performed into the relative permittivity and “ac” conductivity within the 10–106 Hz frequency range at different temperatures. Electrical and dielectric studies reveal that the studied material undergoes a transition around a temperature of 363 K. CsHgCl3 has a high dielectric constant, making it a potential choice for energy harvesting devices. The frequency-dependent “ac” conductivity, evaluated using Jonscher's law, was built to be temperature-dependent. In addition, the low activation energy can reveal the electronic conduction of this material. Several models based on Elliott's theory were used to investigate the conduction mechanism. In the first region, the behavior was in line with the correlated barrier hopping (CBH) model, however, in the second region, the overlapping large polaron tunneling (OLPT) model was seen. Furthermore, the results show a notable improvement of the electrical conductivity when exposed to electrical polarization applied dc-biases of Vp = 0.5 to 3 V at ambient temperature. These findings highlight the impact of the studied material's enormous electro-resistance, which makes it a highly potential candidate for emerging technologies.
Disciplines :
Chemistry
Author, co-author :
Gharbi, Imen;  Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, Sfax, Tunisia
Ghoudi, Arafet;  Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, Sfax, Tunisia
Kammoun, Imed;  Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, Sfax, Tunisia
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Oueslati, Abderrazek;  Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, Sfax, Tunisia
Language :
English
Title :
Dielectric relaxation and charge transfer mechanism of the inorganic perovskite CsHgCl3
Publication date :
August 2024
Journal title :
Inorganic Chemistry Communications
ISSN :
1387-7003
Publisher :
Elsevier B.V.
Volume :
166
Pages :
112565
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 July 2024

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