Abstract
The current work is focused on the thermoelectric properties of Bi2Se3/NaI synthesized by solid-state reaction. X-ray diffraction data show that Bi2Se3/NaI displays a hexagonal crystal structure with the R \(\overline{3}\) m space group. Using a small polaron hopping model, the electrical resistivity data in the high-temperature range (30–425°C) have been explained. The antisite defects with uncharged substitution in the examined crystals simultaneously affect the electrical resistivity and the Seebeck coefficient values when NaI is introduced to the Bi2Se3 matrix. The electrical resistivity of Bi2Se3/6% NaI is 1.2 times lower than that of pure Bi2Se3. Compared to pure Bi2Se3, the Seebeck coefficient and power factor values of Bi2Se3/2% NaI are found to be 1.33 and 1.5 times higher, respectively.
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Data and Code Availability
The thermoelectric data were generated at Centre of clean and green energy centre, Department of Physics, Manipal Institute of Technology, MAHE, Manipal. The findings of this study are available from the corresponding authors [GSH and ANP] on request.
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Acknowledgments
The funds provided under the grant number CRS/2022-23/03/879 and DST-FIST Grant (SR/FIST/PS-1/2017/8) has been used to partially complete the research project. All the authors would like to thank Dr. Gurukrishna K., Post Doctoral Researcher, IIT Kanpur, Mr. Nagendra Prasad, Assistant Professor, Department of Physics, Acharya Institute of Technology, Bengaluru, Dr. Abhiram J. Assistant Professor, Indian Academy Degree College, Bengaluru, Dr. Shivananda C. S., and Dr. Latharani N, Mr. Rajkumar M. Badiger. The authors would also like to acknowledge Dr. Arun Kumar Sonappanavar, Principal, and Mr. Gopiraj S. Senior attender, KLE S. Nijalingappa College, Bengaluru.
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Sample synthesis and preliminary analysis: TB, PV. K N. S., SP, TST., TR., VS. N, RR. P, NS. Methodology: VP P. K., AM., GR. Design and illustration: VD. SK. Review of research work: A. N. P, AR, SP, Data curation and analysis: M. S. M, DS U. Writing, review & editing, supervision: GSH. Mathematical calculation: JK.R.
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Vivekananda, Prarthana, P.K., Archana, M. et al. Enhancing the Thermoelectric Power Factor by Lowering the Electrical Resistivity of Bi2Se3/NaI Composites Prepared by Solid-State Reaction. J. Electron. Mater. 52, 8076–8085 (2023). https://doi.org/10.1007/s11664-023-10725-y
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DOI: https://doi.org/10.1007/s11664-023-10725-y