Universal approach for diffusion quantification applied to lead halide perovskite single crystals

被引：0
|
作者：
Jan Pospisil
Lucie Marackova
Oldrich Zmeskal
Alexander Kovalenko
机构：
[1] Brno University of Technology,Faculty of Chemistry
[2] Czech Technical University in Prague,Faculty of Information Technology
来源：
Applied Physics A | 2023年 / 129卷
关键词：
Impedance spectroscopy; Diffusion; Warburg; Lead halide perovskite;
D O I：
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中图分类号：
学科分类号：
摘要：
A universal approach to calculating diffusion coefficients in lead halide perovskite single crystals, which have ionic and mixed ionic–electronic conductivity, is proposed. Using impedance spectroscopy, it is demonstrated how to model a non-ideal Warburg element and transmission line equivalent circuit to identify ionic diffusion in the material. The proposed method is applicable to samples of any thickness and electrical properties. Additionally, it is shown how to overcome the challenges of low-frequency impedance measurement and the non-ideal behavior of the elements through extrapolative modeling and approximation.
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