Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 2, 2012
Previous Article Next Article

Synthesis, processing, and thermoelectric properties of bulk nanostructured bismuth telluride (Bi2Te3)

Author affiliations

Abstract

Bismuth telluride (Bi2Te3) is the best-known commercially used thermoelectric material in the bulk form for cooling and power generation applications at ambient temperature. However, its dimensionless figure-of-merit-ZT around 1 limits the large-scale industrial applications. Recent studies indicate that nanostructuring can enhance ZT while keeping the material form of bulk by employing an advanced synthetic process accompanied with novel consolidation techniques. Here, we report on bulk nanostructured (NS) undoped Bi2Te3 prepared via a promising chemical synthetic route. Spark plasma sintering has been employed for compaction and sintering of Bi2Te3 nanopowders, resulting in very high densification (>97%) while preserving the nanostructure. The average grain size of the final compacts was obtained as 90 ± 5 nm as calculated from electron micrographs. Evaluation of transport properties showed enhanced Seebeck coefficient (−120 μV K−1) and electrical conductivity compared to the literature state-of-the-art (30% enhanced power factor), especially in the low temperature range. An improved ZT for NS bulk undoped Bi2Te3 is achieved with a peak value of ∼1.1 at 340 K.

Graphical abstract: Synthesis, processing, and thermoelectric properties of bulk nanostructured bismuth telluride (Bi2Te3)

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 10 Aug 2011, accepted on 10 Oct 2011 and first published on 09 Nov 2011


Article type: Paper
DOI: 10.1039/C1JM13880D
Citation: J. Mater. Chem., 2012,22, 725-730
  •   Request permissions

    Synthesis, processing, and thermoelectric properties of bulk nanostructured bismuth telluride (Bi2Te3)

    M. Saleemi, M. S. Toprak, S. Li, M. Johnsson and M. Muhammed, J. Mater. Chem., 2012, 22, 725
    DOI: 10.1039/C1JM13880D

Search articles by author