A novel chemical process of Bi2Te2.7Se0.3 nanocompound for effective adjustment in transport properties resulting in remarkable n-type thermoelectric performance

Cham Kim, Chang Eun Kim, Ju Young Baek, Dong Hwan Kim, Jong Tae Kim, Ji Hyeon Ahn, David Humberto Lopez, Hoyoung Kim

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Chemical reaction processes for thermoelectric nanomaterials have received a lot of attention because of subsequent small and uniform nanostructures, causing a remarkable reduction in thermal conductivity; however, they typically showed low electrical properties possibly due to contaminations by chemicals resulting in low ZT. We devised a new chemical process for synthesizing an n-type Bi2Te2.7Se0.3 nanocompound without the chemicals causing potential contaminations. The product exhibited a predominant electrical conductivity while retaining the advantage of chemical reaction routes; thus, synergistic effect of the thermoelectric transport properties was greatly induced, resulting in the highest ZT among n-type Bi2Te3 materials in bulk phase.

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalScripta Materialia
Volume119
DOIs
StatePublished - 1 Jul 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Keywords

  • Bismuth telluride
  • Electrical conductivity
  • Nanostructure
  • Thermal conductivity
  • Thermoelectric materials

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