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Structure-property relationships in tris(2-amino-5-methylpyridinium) hexabromobismuthate monohydrate with a focus on optical and electrical behavior for optoelectronics applications.

作者信息

Altalib Rima, Ibrahmi Imen, Ghoudi Arafet, Znaidia Sami, Rekik Walid, Lhoste Jerome, Oueslati Abderrazek

机构信息

Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax BP 1171 3000 Sfax Tunisia

Laboratoire de recherche (LR 18ES19), Synthese Asymetrique et Ingenierie Moleculaire de Materiaux Organiques our L'electroniques Organiques, Facult des sciences de Monastir 5000 Tunisia.

出版信息

RSC Adv. 2025 Sep 11;15(39):32906-32918. doi: 10.1039/d5ra04097c. eCollection 2025 Sep 5.

DOI:10.1039/d5ra04097c
PMID:40949046
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12424129/
Abstract

The hybrid compound (CHN)[BiBr]HO was synthesized slow evaporation and structurally characterized using single-crystal X-ray diffraction. It crystallizes in the monoclinic 2/ space group and adopts a zero-dimensional architecture composed of isolated [BiBr] octahedra, protonated organic cations (CHN), and water molecules. These components are interconnected through hydrogen bonding and π-π interactions. Optical absorption measurements reveal a direct band gap of 2.81 eV, confirming the semiconducting nature of the material. Impedance spectroscopy, performed over a frequency range of 0.4 Hz to 3 MHz and a temperature range of 318 K to 363 K, reveals separate contributions from grains and grain boundaries. These were modeled using an equivalent circuit, indicating non-Debye relaxation behavior. The DC conductivity follows an Arrhenius-type behavior with activation energies of 0.96 and 0.51 eV. AC conductivity obeys Jonscher's power law, and the temperature-dependent decrease in the frequency exponent () supports the correlated barrier hopping (CBH) mechanism. The material exhibits enhanced dielectric permittivity, suggesting promising potential for optoelectronic and energy storage applications.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a5d/12424129/abeabb68e380/d5ra04097c-f15.jpg
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