Abstract
Two-dimensional (2D) hybrid metal halide perovskite is receiving more interest today due to being more stable and having a higher surface area-to-volume ratio than 3-dimensional (3D) hybrid metal halide perovskites. To create a 2D structure with high-efficiency properties, the A cation in the parental 3D structure should be replaced with a bulky organic cation (BOC). So in this study, we aim to investigate the structural, electrical, and optical characteristics of 2D (2-AMP)PbI4 via CASTEP computer code and density functional theory (DFT). The computations utilize the local density approximation (LDA) and the generalized gradient approximation (GGA) techniques. The structural characteristics of GGA-PBEsol demonstrate great agreement with experiment data. The (2-AMP)PbI4 structure consists of corner-sharing PbI64− octahedra separated by alternating sheets of the double-protonated 2-AMP cation. Due to the spin–orbit coupling (SOC) effect, the electronic band gap was reduced from 1.92 to 0.98 eV. According to the partial density of states (PDOS), the Pb-p and I-p bonds supply the most electrons to the band gap. When it comes to optical characteristics, the actual part of the dielectric function reveals that this compound exhibits plasmonic behavior, which increases its capacity to absorb light. The absorption coefficient of (2-AMP)PbI4 shows that this 2D compound able to absorb light in the range of UV and visible light, making it a possible candidate for high-efficiency solar cell devices.
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Data Availability
Crystallographic data for the structure used in this article have been accessed through Cambridge Crystallographic Data Centre, under deposition numbers CCDC 1838613. Copies of the data can be obtained free of charge via https://www.ccdc.cam.ac.uk/structures/. All other relevant data generated and analysed during this study which include computational data, are included within the article.
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Acknowledgements
This work is funded by the Ministry of Higher Education (MOHE) via the Fundamental Research Grant Scheme (FRGS/1/2021/STG07/UITM/02/7). The authors would like to thank Universiti Teknologi Mara (UiTM), Ionics Materials & Devices (iMADE) Research Laboratory for their support in providing research facilities for this research and the postdoc Dr. Mohd Hazrie Samat for computational assistance.
Funding
This work was supported by the Ministry of Higher Education (MOHE) via the Fundamental Research Grant Scheme (FRGS/1/2021/STG07/UITM/02/7). A. Ramli receives research support from Fundamental Research Grant Scheme Phase 1 in 2021.
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All authors contributed to the study’s conception and design. Material simulation, data collection, and analysis were performed by Nur Fatin Najihah Abdul Yami, Nur Hamizah Mohd Zaki, and Azliana Ramli. Wan Izhan Nawawi Wan Ismail, Ab Malik Marwan Ali, Mohamad Fariz Mohamad Taib, Oskar Hasdinor Hassan, Suhaila Sepeai, and Suhaida Dila Safian supervised the content and the flow of the paper. The first draft of the manuscript was written by Fatin Najihah Abdul Yami, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Yami, N.F.N.A., Ramli, A., Nawawi, W.I. et al. Structural, electronic, and optical properties of lower-dimensional hybrid perovskite lead-iodide frameworks + SOC via density functional theory. emergent mater. 6, 999–1007 (2023). https://doi.org/10.1007/s42247-023-00484-1
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DOI: https://doi.org/10.1007/s42247-023-00484-1