Radoń Adrian, Łukowiec Dariusz, Włodarczyk Patryk
Łukasiewicz Research Network - Institute of Non-Ferrous Metals, Sowinskiego 5 St., 44-100, Gliwice, Poland.
Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18 a St., 44-100, Gliwice, Poland.
Sci Rep. 2020 Dec 16;10(1):22094. doi: 10.1038/s41598-020-79018-2.
The dielectric properties and electrical conduction mechanism of bismuth oxychloride (BiOCl) plates synthesized using chloramine-T as the chloride ion source were investigated. Thermally-activated structure rebuilding was monitored using broadband dielectric spectroscopy, which showed that the onset temperature of this process was 283 K. This rebuilding was related to the introduction of free chloride ions into [BiO] layers and their growth, which increased the intensity of the (101) diffraction peak. The electrical conductivity and dielectric permittivity were related to the movement of chloride ions between plates (in the low-frequency region), the interplanar motion of Cl ions at higher frequencies, vibrations of these ions, and charge carrier hopping at frequencies above 10 kHz. The influence of the free chloride ion concentration on the electrical conductivity was also described. Structure rebuilding was associated with a lower concentration of free chloride ions, which significantly decreased the conductivity. According to the analysis, the BiOCl plate conductivity was related to the movement of Cl ions, not electrons.
研究了以氯胺 - T作为氯离子源合成的氯氧化铋（BiOCl）板的介电性能和导电机制。使用宽带介电谱监测热激活结构重建，结果表明该过程的起始温度为283 K。这种重建与游离氯离子引入[BiO]层及其生长有关，这增加了（101）衍射峰的强度。电导率和介电常数与氯离子在板间的移动（低频区域）、较高频率下Cl离子的面间运动、这些离子的振动以及频率高于10 kHz时的电荷载流子跳跃有关。还描述了游离氯离子浓度对电导率的影响。结构重建与较低浓度的游离氯离子有关，这显著降低了电导率。根据分析，BiOCl板的电导率与Cl离子的移动有关，而非电子。
