Enhancing the Thermoelectric Power Factor by Lowering the Electrical Resistivity of Bi2Se3/NaI Composites Prepared by Solid-State Reaction

Vivekananda, P. K. Prarthana, M. Archana, R. Gowrishree, Tejashree Bhat, V. Prakruthi, N. S. Keerthana, P. Sharath, T. Tabassum Sulthana, R. Thulasi, Vaishnavi S. Naidu, V. S. Shilpa, D. Vinay, S. Nalina, Rajeev R. Potadar, Ganesh Shridhar Hegde, A. N. Prabhu, Ashok Rao, U. Deepika Shanubhogue, Suchitra PutranM. S. Murari, K. R. Jahnavi, Sujeet Kumar

Research output: Contribution to journalArticlepeer-review

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 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. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)8076-8085
Number of pages10
JournalJournal of Electronic Materials
Volume52
Issue number12
DOIs
Publication statusAccepted/In press - 2023

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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