Thermoelectric transport properties of Cu nanoprecipitates embedded Bi2 Te 2.7 Se0.3

Eunsil Lee, Jin Il Kim, Soon Mok Choi, Young Soo Lim, Won Seon Seo, Jong Young Kim, Kyu Hyoung Lee

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4 Citations (Scopus)

Abstract

We suggest a simple and scalable synthesis to prepare Cu-Bi2 Te 2.7 Se0.3 (Cu-BTS) nanocomposites. By precipitating Cu nanoparticle (NP) in colloidal suspension of as-exfoliated BTS, homogeneous mixtures of Cu NP and BTS nanosheet were readily achieved, and then the sintered nanocomposites were fabricated by spark plasma sintering technique using the mixed powder as a raw material. The precipitated Cu NPs in the BTS matrix effectively generated nanograin (BTS) and heterointerface (Cu/BTS) structures. The maximum Z T of 0.90 at 400 K, which is 15% higher compared to that of pristine BTS, was obtained in 3 vol% Cu-BTS nanocomposite. The enhancement of Z T resulted from improved power factor by carrier filtering effect due to the Cu nanoprecipitates in the BTS matrix.

Original languageEnglish
Article number820893
JournalJournal of Nanomaterials
Volume2015
DOIs
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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