Ben Bechir Mohamed, Akermi Mehdi, Alathlawi Hussain J
Laboratory of Spectroscopic and Optical Characterization of Materials (LaSCOM), Faculty of Sciences, University of Sfax BP1171 - 3000 Sfax Tunisia
Department of Physics Sciences, College of Sciences, Jazan University P. O. Box 114 Jazan 45142 Kingdom of Saudi Arabia
RSC Adv. 2024 Apr 30;14(20):14221-14232. doi: 10.1039/d4ra02031f. eCollection 2024 Apr 25.
In the exploration of perovskite materials devoid of lead and appropriate for capturing solar energy, a recent finding has surfaced concerning CsZrCl. This compound has attracted interest as a potential candidate, displaying advantageous optical and electrical features, coupled with remarkable durability under environmental stresses. This research outlines the effective production of non-toxic metal halide nanoparticles of CsZrCl using the gradual cooling technique. Thorough examinations have been conducted to explore the structural, optical, and dielectric traits. Over the frequency range of 10-10 Hz, the dielectric constant, loss factor, electric modulus, and electrical conductivity of CsZrCl exhibit a strong dependence on temperature. The Nyquist plot confirms the distinct contributions of grains and grain boundaries to the total impedance. In the high-frequency region, the dielectric constant tends to increase with temperature. In accordance with the modified Kohlrausch-Williams-Watts (KWW) equation, an asymmetric nature corresponding to the non-Debye type is observed in the electric modulus spectra at different temperatures. Furthermore, the imaginary part of the electric modulus spectrum shifts from the non-Debye type towards the Debye type with increasing temperature, despite not obtaining an exact Debye response. The frequency-dependent behavior of AC conductivity has been modeled using Joncher's universal law. The conduction mechanism within the CsZrCl compound is attributed to the small polaron tunneling model (NSPT). Furthermore, CsZrCl has the potential to function as an energy harvesting device due to its elevated dielectric constant combined with minimal dielectric loss.
在探索不含铅且适合捕获太阳能的钙钛矿材料过程中，最近有一项关于CsZrCl的发现浮出水面。这种化合物作为一种潜在候选物引起了人们的兴趣，它展现出有利的光学和电学特性，以及在环境应力下卓越的耐久性。本研究概述了使用逐步冷却技术有效制备无毒的CsZrCl金属卤化物纳米颗粒的方法。已进行了全面的研究以探究其结构、光学和介电特性。在10⁻¹⁰ Hz的频率范围内，CsZrCl的介电常数、损耗因子、电模量和电导率对温度表现出强烈的依赖性。奈奎斯特图证实了晶粒和晶界对总阻抗的不同贡献。在高频区域，介电常数倾向于随温度升高。根据修正的科尔劳施 - 威廉姆斯 - 瓦特（KWW）方程，在不同温度下的电模量谱中观察到对应于非德拜类型的不对称性质。此外，尽管未获得精确的德拜响应，但随着温度升高，电模量谱的虚部从非德拜类型向德拜类型转变。交流电导率的频率依赖性行为已使用琼歇尔通用定律进行建模。CsZrCl化合物内部的传导机制归因于小极化子隧穿模型（NSPT）。此外，由于其高介电常数和最小的介电损耗，CsZrCl有潜力用作能量收集装置。
