Document Type
Article
Publication Date
10-7-2024
Abstract
Halide and cation engineering of organic–inorganic hybrid perovskites has shown a great potential for structural modulation of perovskites and enhancing their optoelectronic properties. Here, we studied the impact of Cl/Br halide engineering on the structural and piezoelectric properties of MA/Cs mixed-cation Cu-perovskite crystals. X-ray diffraction, Raman spectroscopy, and 133Cs solid-state NMR were utilized to find out the nature of the perovskite crystal structure formation. Three distinct crystal structures were obtained depending on the Cl/Br content. High Cl content resulted in the formation of Br-doped (Cs/MA)CuCl3 perovskite with the presence of paramagnetic Cu2+ ions. High Br content led to the formation of Cl-doped (MA/Cs)2CuBr4 perovskite with the presence of diamagnetic Cu+ ions. Equimolar Cl/Br perovskite content gave a novel crystal structure with the formation of well-dispersed diamagnetic domains. Compared to the high Cl/Br containing perovskites, the equimolar Cl/Br perovskite revealed the highest potential for piezoelectric applications with a maximum recordable piezoelectric output voltage of 5.0 V. The results provide an insight into the importance of mixed-halide and mixed-cation engineering for tailoring the perovskite structural properties towards a wide range of efficient optoelectronics.
Recommended Citation
Elattar, Amr, Christopher Munoz, Libor Kobera, Andrii Mahun, Jiri Brus, Mohammed Jasim Uddin, Yasuhiko Hayashi, Okenwa Okoli, and Tarik Dickens. 2024. “Enhanced Piezo-Response of Mixed-Cation Copper Perovskites with Cl/Br Halide Engineering.” Materials Advances 5 (22): 8953–60. https://doi.org/10.1039/D4MA00970C
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 3.0 License
Publication Title
Materials Advances
DOI
https://doi.org/10.1039/D4MA00970C
Comments
http://creativecommons.org/licenses/by-nc/3.0/