Abstract
The inorganic lead-based metal halide perovskites are widely studied for optoelectronic applications because of their tunable structural, optical and electrical properties. On the other hand, due to the instability and toxicity of lead-based perovskites, it is difficult to apply them on a large-scale. The lead-free nature and air stability of dual-phase tin (Sn)-based halide perovskites make them as possible candidates to replace lead (Pb)-based perovskites. For the first time, Composition-tunable structural and optical properties of dual-phase CsSnBr3–CsSn2Br5, Cs2SnBr4–CsBr, and Cs4SnBr6–CsSnBr3 perovskite semiconductors were synthesized and comprehensively reported here. The perovskites were prepared using a composition (CsBr–SnBr2), mechano-chemical and water-induced solvent precipitation method. In addition, the structural, optical and thermal properties were investigated. XRD analysis confirms the layered crystal structure of perovskite composites. FESEM studies demonstrate the formation of aggregate crystals of various sizes. The optical absorption spectrum was used to calculate the enhanced optical properties. The bandgap was reduced from 2.61 to 2.27 eV. The PL spectrum confirms that light is emitting in the yellow and green color regions. The prepared perovskite semiconductors have the potential for various optoelectronic applications.
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The data described in this article is available as a preprint in the Social Science Research Network at https://doi.org/10.2139/ssrn.4231466.
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Acknowledgements
The authors would like to express their gratitude to B.S.Abdur Rahman Crescent Institute of Science and Technology, Chennai – 48, for providing University JRF (Lr. No. 958/Dean(R)/2021 date:24.08.21), and Crescent Seed Money (CSD/CSM/6 Order date:11.03.2021), We acknowledge the XRD FACILITY at SRMIST set up with support from MNRE (Project No. 31/03/2014-15/PVSE-R&D), Government of India. We acknowledge SRMIST for the high resolution scanning electron microscope (HR-SEM) facility. Central Instrumentation Facility, Pondicherry University, Puducherry-605014 provided the UV and Pl studies. The Department of Chemistry, Gandhigram Rural Institute, Dindugal provided the TGA analysis.
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N. Gopinathan and S. Sathik Basha both contributed to the conception, experimental design, carrying out measurements and manuscript composition. R.Amiruddin contributed to the carrying out measurements and manuscript composition. M.Mubeen contributed to manuscript composition
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Gopinathan, N., Sathik Basha, S., Mubeen, M. et al. Composition-tunable structural and optical properties of dual-phase cesium tin bromide perovskite semiconductors. J Mater Sci: Mater Electron 35, 627 (2024). https://doi.org/10.1007/s10854-024-12364-3
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DOI: https://doi.org/10.1007/s10854-024-12364-3