Tunable thermoelectric transport properties of Cu0.008Bi2Te2.7Se0.3 via control of the spark plasma sintering conditions

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

Research output: Contribution to journalArticle

Abstract

Polycrystalline bulks of n-type Cu0.008Bi2Te2.7Se0.3 were prepared to investigate the controllability of its thermoelectric transport properties by using the compaction conditions of spark plasma sintering (SPS). The 00l crystal orientation to the press direction of the SPSed bulks was easily improved by increasing the applied pressure at 500 °C. The thermoelectric figure of merit, ZT values (0.72 − 0.75 at 300 K), of all samples were almost the same, however, both the electronic and the thermal transport properties could be tuned significantly by adjusting the sintering pressure. This result highlights the feasibility of using pressure-induced sintering as a fabrication technology for Bi2Te3-based polycrystalline bulks with high mechanical reliability, which is an effective means of optimizing the electrical and the thermal conductivities for maximizing the efficiencies of the thermoelectric cooling and the power generation modules.

Original languageEnglish
Pages (from-to)811-815
Number of pages5
JournalJournal of the Korean Physical Society
Volume69
Issue number5
DOIs
Publication statusPublished - 2016 Sep 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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