Enhanced thermoelectric performance of p-type Bi04Sb16Te3 by excess Te addition

Tae Wan Kim, Jong Wook Roh, Seung Pil Moon, Yeon Sik Ahn, Hee Jung Park, Soon Mok Choi, Jong Young Kim, Sung Wng Kim, Kyu Hyoung Lee

Research output: Contribution to journalArticle

Abstract

Thermoelectric properties of p-type Bi0.4Sb1.6Te3 polycrystalline bulks fabricated by spark plasma sintering from the ingots of stoichiometric Bi0.4Sb1.6Te3 and 0.5–3 wt.% excess Te added compositions were investigated in an effort to demonstrate the feasibility of traditional melt-solidification combined with a pressure induced sintering process. We found that the electronic and thermal transport properties of p-type Bi2-xSbxTe3 could be optimized by excess Te addition due to the suppression of uncontrollable formation of Te-vacancies during the fabrication process. Enhanced thermoelectric performance ZT of 1.1 at 300 K was obtained in 1, 2, and 3 wt.% excess Te added Bi0.4Sb1.6Te3. High ZT and superior controllability of the thermoelectric transport parameters achieved in the present study enable the pressure induced sintering process to be utilized for commercial manufacturing process for solid state cooling and power generation modules.

Original languageEnglish
Pages (from-to)7681-7684
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume17
Issue number10
DOIs
Publication statusPublished - 2017 Oct

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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    Kim, T. W., Roh, J. W., Moon, S. P., Ahn, Y. S., Park, H. J., Choi, S. M., Kim, J. Y., Kim, S. W., & Lee, K. H. (2017). Enhanced thermoelectric performance of p-type Bi04Sb16Te3 by excess Te addition. Journal of Nanoscience and Nanotechnology, 17(10), 7681-7684. https://doi.org/10.1166/jnn.2017.14820