Scholarlink

<p>This study presents a comprehensive investigation of the temperature- and frequency-dependent electrical properties of the organic–inorganic hybrid compound {(L-C<sub>5</sub>H<sub>9</sub>NO<sub>2</sub>)(L-C<sub>5</sub>H<sub>10</sub>NO<sub>2</sub>)CdCl<sub>3</sub>}<sub>n</sub>, hereafter abbreviated [(LPro)(LPro<sup>+</sup>)CdCl<sub>3</sub>]<sub>n</sub>, using impedance spectroscopy. Dielectric permittivity, impedance and AC conductivity measurements were taken over a temperature range of 333–413&#xa0;K and a frequency range of 20&#xa0;Hz–2&#xa0;MHz. The experimental impedance data demonstrate excellent agreement with an equivalent circuit model consisting of parallel RC elements connected in series, confirming the presence of distinct relaxation processes within the material. The AC conductivity analysis reveals frequency-dependent behavior that is successfully described by the correlated barrier hopping (CBH) model, indicating that charge transport occurs through thermally activated hopping between localized states. The temperature dependence of the conductivity parameters provides strong evidence for a bipolaron hopping mechanism, characterized by a higher activation energy compared to single polaron transport. The consistency of the calculated maximum barrier height values with bipolaron formation within the organic matrix substantiates this conclusion. Moreover, the density of localized states near the Fermi level, <i>N</i><sub>(<i>EF</i>)</sub>, was extracted as a function of frequency. It was found that <i>N</i><sub>(<i>EF</i>)</sub> increases with temperature at constant frequency and with frequency at constant temperature. This behavior indicates that the charge transport mechanism is dominated by thermally activated hopping between localized state pairs. The results demonstrate that the hybrid organic–inorganic structure of [(LPro)(LPro<sup>+</sup>)CdCl<sub>3</sub>]<sub>n</sub> facilitates efficient charge transport through the organic chains while maintaining structural stability through the inorganic cadmium chloride framework. These findings contribute to the fundamental understanding of charge transport mechanisms in organic–inorganic hybrid materials and highlight the potential applications of such compounds in electronic devices requiring specific conductivity characteristics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Diectric properties of a novel ionic organic–inorganic hybrid coordination polymer {(L-C5H9NO2)(L-C5H10NO2)CdCl3}n

  • 期刊论文

  • 发表日期：

    2025年9月26日

查看全文
  • Sahel Karoui,
  • Slaheddine Kamoun

摘要

This study presents a comprehensive investigation of the temperature- and frequency-dependent electrical properties of the organic–inorganic hybrid compound {(L-C5H9NO2)(L-C5H10NO2)CdCl3}n, hereafter abbreviated [(LPro)(LPro+)CdCl3]n, using impedance spectroscopy. Dielectric permittivity, impedance and AC conductivity measurements were taken over a temperature range of 333–413 K and a frequency range of 20 Hz–2 MHz. The experimental impedance data demonstrate excellent agreement with an equivalent circuit model consisting of parallel RC elements connected in series, confirming the presence of distinct relaxation processes within the material. The AC conductivity analysis reveals frequency-dependent behavior that is successfully described by the correlated barrier hopping (CBH) model, indicating that charge transport occurs through thermally activated hopping between localized states. The temperature dependence of the conductivity parameters provides strong evidence for a bipolaron hopping mechanism, characterized by a higher activation energy compared to single polaron transport. The consistency of the calculated maximum barrier height values with bipolaron formation within the organic matrix substantiates this conclusion. Moreover, the density of localized states near the Fermi level, N(EF), was extracted as a function of frequency. It was found that N(EF) increases with temperature at constant frequency and with frequency at constant temperature. This behavior indicates that the charge transport mechanism is dominated by thermally activated hopping between localized state pairs. The results demonstrate that the hybrid organic–inorganic structure of [(LPro)(LPro+)CdCl3]n facilitates efficient charge transport through the organic chains while maintaining structural stability through the inorganic cadmium chloride framework. These findings contribute to the fundamental understanding of charge transport mechanisms in organic–inorganic hybrid materials and highlight the potential applications of such compounds in electronic devices requiring specific conductivity characteristics.